A short somewhere in the circuit could also be causing your fuse to blow. I've never heard of a (pump) bearing having increasing friction (current increase) and then resetting itself (low current draw) and then increasing friction again. E. It is very important to correctly size and select the vacuum pump as it is to lay down the right specifications. But a bad fuel pressure regulator can also do it, by letting pressures go too high. the tank and preferably behind or next to the fuel tank. Draws less current than O. The fuel pump is powered through the fuel pump relay pin 87. Take a look at the failed relay by opening it. If you've got a suspicion that a pump is drawing too much power, consult your IOM first, then check against this list of other possibilities. > Also, some of those pump up to well over 30PSI which would be way too much > for model systems. However, the most common causes of these items to draw to much current are the fuel pump and ignition coil. pin # 86 comes from your switch. You risk the chance of causing a fire. It's basically a big ass fuse that will blow if the pump is drawing too much current. The light blue wire with a orange wire gets grounded by the PCM Computer to turn on the fuel pump. In many cases it sits in the pump. Use low amp probe and oscilloscope to diagnose average fuel pump amperage draw. Feb 09, 2016 · Fuel Pump Features. Very soon it did it again. 8 to fuel pump @ idle. In other words the pump is pulling too much current (amps). Sep 12, 2012 · As a rule of thumb on port fuel-equipped vehicles, fuel pump current draw increases by 1 amp for every 10 pounds of fuel pressure. One time, I thought my fuel pump was dead too, but it turned out to be the fusible link in the trunk, on the right side line between the battery and the fuel pump. All it's doing is supplying fuel to the injectors, and the PCM controls how much fuel is delivered to each cylinder. or just bad Electrolytic Capacitors. Otherwise? A worn fuel pump could be drawing too much current such that it pulls down the voltage. Just posting this in a few places because I had starting problems with my Mk 3 Galaxy and just found a fix. Due to back EMS. Unplug all these devices, to test this theory. Stale fuel. Some test lights draw too much current and can damage computer modules. 1) weak starter that's drawing to much current to start the motor, so nothing is left for the fuel pump 2) bad fuel pump, but it runs like a champ on 12 volts 3) the oil pressure sensor, but that shouldn't impact the start cycle, right? Thanks! You may have a failing fuel pump causing the relays to keep burning up. opposed to a spiral or coiled wire, which may have too much resistance. Conversely, an inline mounted pump somewhere in the middle of the vehicle or even under the hood is considered a puller, since there is a lot of fuel line between it and the tank. I have a feeling the pump is drawing too much current because of a bad connection from when I replaced fuel pump a few months ago. 7 Chevy: Fuel Pump Waveforms Note the waveforms (up and down) that is the pump cycling on and off. others I have seen basic just routing the fuel lines being too close to the exhaust. You'll need either a low-reading analog ammeter or a DMM (Digital Multi-Meter) with suffi cient current-carrying 2AAE Fuel Pump 2AAF Fuel Pump, plausibility 2A2D Fuel low-pressure system, fuel pressure EKPS: 6291 Control voltage too high 6293 Control current too high Cleared the codes, drove around, all codes returned except 2A2D. I did some troubleshooting and found a blown fuel pump fuse. The positive battery lead needs to be taken apart and cleaned thoroughly since it is a well-known The harness coming from the body harness running to the fuel pump itself is 18awg wire. Apr 05, 2019 · The fuel pump relay (or a second relay wired in parallel if you are worried about too much current) can be a handy source of power for other devices. 0L, 5. What are the signs of a broken fuel pump relay? Common problems with your electric fuel pump relay involve sending too much electricity or not sending any. Mastertech is right. May 26, 2015 · Your instructor, Dave Hobbs, takes you through advanced testing procedures to determine the current draw of the modern fuel pump, including how to read the current draw, how to determine the exact resistance in the fuel pump you’re testing by way of its unique current signature, using a scope and by using Ohm’s law to […] The only times I’ve seen fuel pump fuses damaged and/or blown was when the pump was drawing too much current, and/or it was shorted Good luck, in any case ok4450 Fuel pump is drawing too much current (4 amps is normal). check the oil pressure switch located in the back of the engine, this will also prevent voltage from getting The most common cause of this is that the fuel pump is drawing to much current due to wear and a possible burned fuel tank connector at the tank. Fuel is drawn in using the high pressure pump beside the engine. Fuel filter plugged. I asked about that when I got a phone call from Racetronix but was unclear on the answer I got, (too much noise pollution while on phone) I remember him saying it might run both pumps constantly which doesn't make sense to me because the 2nd pump is triggered via Hobbs switch right? So, if an amplifier, for example, is rated at 500 watts (power) and your electrical system produces 13. As the car was going to Glenmoor the next day, I purchased a Carter P60430 electric fuel pump and then drove the 60 miles to and from the Glenmoor show. I just replaced my gas tank and fuel pump because it was doing the same thing, melting fuses. Yes, the in-rush current on electric fans can be higher then 60amps for a 10 amp motor. Also replace the fuel filter which is on the inside of the frame on the drivers side. A 40-micron element it sufficient to protect the pump from contamination such as dirt, rust, fuel cell foam, etc. Excessively early timing of fuel injection pump. (Grundfos Energy) Your pump might be one of them. fuse that blows will indicate which component is drawing too much current. Usually this is a dual problem, bum fuel pump that is drawing too much current and a damaged igniter that is breaking down from too much of a current draw because of a bad pump. The motor is now a 1776 with dual 40HPMX carbs. (I think the pumps are spec'd at about 10A continuous draw when in operation. Make sure that a low restriction filter is between the tank and the pump. Don't just put a bigger fuse in, it was 15AMP for a reason. The red wire supplies power to the coil of the relay and it comes from the PCM Power relay. However that current is only lasting for a duration of a few microseconds and is not enough to blow a fuse. Using late-model C4s and C5s as examples, when you see a pump rated at 255 lph at the C4’s standard 43 psi, that pump may only flow 225 lph at the LS engine’s higher 58 psi. If the ground circuit does not draw amperage, the problem is likely either the  20 Dec 2016 If it is low, then the pump will draw more current, this in turn will cause that is the causing the pump problem, if it was you'd notice too many  The centrifugal pump is drawing too much amperage. P0353 : Ignition Coil # 3 Primary Circuit Oct 09, 2012 · If they check out okay then it looks likely that the pump is dieing and drawing too much current. The answer is, according to CAPA, who I just wrang, 6 - 8 Amps on start up, and then settles down to about 3 -4 A. Too much current through the fuel pump relay will cause it to get hot and probably melt internally and cause it to stop working. -- then that's likely the source of your fault. You could trigger the relay manually if your engine is currently  A microwave oven transformer will give you all the current you want and supply will shut off automatically if you try to draw too much current. Fuel Pressure too high. When engine shuts down the fuel pump is on/off all the time @ approx 1 second intervals. 00 relay in mine, that cost me a half a day out on the lake. Fuses are designed to protect a circuit by "blowing" when too much current is being drawn. Relays typically have a winding that when a voltage is applied, pull in a set of contacts to pass the much higher current or voltage. changed fuel module as you suggested and discovered a fuse blown, a 20 amp ECM-1. 00 and , of course, the damaged connector and the fuseable link which had blown. I am posting here to get the most coverage from riders. Wiring that will carry enough current. Considering the idea of lowering current: Probably the least expensive repair that has a chance of becoming a long term fix is to get the fuel pump wiring off of the board as much as possible, using an external relay to handle the current the fuel pump draws. Improper fuel. You don't know until you troubleshoot. Wide x 2. fuel system Fuel and air are delivered to the engine through several components. I tend to lean towards overkill, so I'd run 12 or 10 gauge wire off of a relay wired into the ignition switch, but that's just me! You better run a relay. All Star can tell is how much current draw the fuel pump is using to determine if it is dead shorted, open circuit, or drawing the appropriate amount of current. Some of the stainless fuel tanks hold the head in. The Mk 3 and a few other fords have no lift pump. Something else that seems to help is an isolator spacer between the intake and throttle body. 99 30 amp 4 pin relay like this: pin # 30 comes directly from a fused (20 a at least) direct 12v source. 15 volts using an 8-ga cable, and about 0. Replenish your vehicle’s fuel tank and restart it, checking for all of the above signs of a bad pump. 4 Ford is a 5. Tall) for easy installation on frame rails or other tight areas Series : Holley Dominator In-Line Billet Electric Condition : New Quantity Sold : Sold individually Recommended Use : Performance Replacement Operation : Electric Fuel Sending Unit Included : Without Fuel Sending Unit Pressure Sensor Included : Without Pressure Sensor Product Fit : Universal Flow Rate : 130 gallons/hour Inlet Quantity : 1 Inlet Disconnect the fuel pump wires and test with a voltage meter to make sure that the pump is receiving power. In fact, I just had a 2. You can do this right at the fuse block with the fuel pump relay remove. With the pump as close to the tank as possible, it is considered to be pushing the fuel since the majority of the fuel system is in FRONT of the pump. Today's pumps account for no less than 10% of the world's electricity consumption. 3> Motor power factor. . being a 20A my money is on the fuel pump going bad and drawing too much current Fuses disable circuits that are drawing too much current, preventing fires and protecting the components that the circuit serves. So put a fuel pressure gauge on it. About the only way to know the true health of your in-tank fuel pump is to install a temporary pressure test "T" between the firewall and engine itself. If I suspect there is a problem with the power supply to the fuel pump, this is the first thing I do. 0 amps its time for a new one. Oct 27, 2010 · Wow yes sounds like something on that fuel pump circuit is drawing too much current, the fuse is rated at 10 amps may only protect the fuel pump relay circuit as the fuel pump its self would draw about 4 to 6 amps. The fuel pump voltage booster increases fuel flow by increasing the voltage to the fuel pump, will draw too much current for the fuel pump controller. 3> Motor fixed losses. But a voltage drop in the bypassed circuit could cause low current at the pump during normal vehicle operation. Had the same failure on my wife's 2010 DTS. Regardless, the fuse will continue to blow until you address the root cause of the problem. Both the 450 (F90000267) and the 450 High pressure (F90000274) flow 450lph @ 50psi base pressure; The 450 (F90000267) and 450 High Pressure (F90000274) will both Support 500+hp on E85 Fuel and 700+ on pump gas applications. The old relay may be "welded" in the closed position by the current going through it. Amperage Requirement for Terminator Operation. Aug 19, 2016 · Do you think I would need this big of a wire if I am using ECU control of the pump. The fact that the relay only sends power to the pump when triggered by the ECU firing the coils could be why it takes a couple seconds. If it is, it’s the pump, if its not, it’s a relay or ECM. My guess that the fuel pump itself is likely faulty and is drawing too much current. 10 volts using a 6-ga cable. Or try running thru the 1N4000 and see if it gets hot. The way this is done, is by bypassing the fuel pump controller and anything else that may be adding resistance along the line from the power source (battery) to the terminal of the fuel pump itself. Helbako control out voltage 9. Mallory has them available Is the fuel pump shorting out, or drawing too much power? If so, which would be causing this, the internal or the external pump? It works fine until the fuse melts to the point of not making contact. Determining RPM But if that fuse blows, it could be for shorts causing the ECU/PCM or Fuel Pump to draw too much current. The reason I am asking is that it would require modification to my fuel pump module to get a larger wire to enter the tank and hookup to the pump. To get these waveforms, you will need a low amp probe. 1A current, equivalent to 24-26W as the battery voltage of 12-13 volts. Would this blow this fuse. The HEI module requires 4-8 amps (depending on who makes the module - standard GM or high performance aftermarket), and the Walbro GSS-340 (255L/hr) fuel pump requires 8 to 9 amps (at 12 volts or 13. Measure amp draw on each leg 4. Briefly, I would like to tell you how I approach a no start situation, I begin by checking the fuel gauge to see if it has fuel in the tank. It almost has to be the motor or the supply to the motor having decreasing voltage due to a bad connection (and so the motor draws more current to keep up with demand). Mechanical automotive fuel pumps generally do not generate much more than 10 –15  12 Sep 2012 Fuel Pump Diagnostics – Using Voltage Drops and Current Draw It doesn't take much to introduce 0. Fuel pumps draw from 10 to 20 amps or so depending on the fuel line pressure (higher line pressure means higher current draw). Dec 19, 2010 · Knowing that electric fuel pumps push better than pull, and wanting to clean up the look under the hood, I bought a Carter P60430 12-volt electric fuel pump and mounted it near the gas tank. 3L, 5. 95). 5 volts) Apr 06, 2018 · You can use a volt ohmmeter to measure the current draw of the pump and see if it is within factory specified limits. This may cause the pump to produce the loud humming sound besides stalling along the way. So, you need to have really good wiring going back to it. When I have my autotune connected to my power commander v, the fuel pump continues to prime. If it blows immediately it is probably a short. If you’re not out of fuel and your vehicle lost power before it died, fuel is probably not getting to the engine. These systems also use an FPDM (Fuel Pump Driver Module), which is an electrical device designed to keep the desired pressure at the injectors and controls the power sent to the fuel pump. You can do the same around the fuel pump power wire but it'd be more of a pain in the rear end if you don't have a lift. Just be sure the pump provides the necessary flow at the pressure you need. For me the best choice was an electric pump. 21 Jul 2017 Could fuel pump be culprit? I'm figuring that if it was drawing too much current the 15 amp fuse would blow, fusable link to fuel pump relay is 50  It's important to know how much current the engine, lights and other accessories If there is no fuse protection, or the amp rating of the fuse is too high to coil or multi-coil), the amp draw of the PCM, and the fuel pump (the amp draw will be  21 Apr 2015 Causes of excessive current drain from a car battery include things like A fuel pump relay that sticks on may keep the fuel pump running after the engine is shut off. This is the value of the amps drawn by the well pump. To blow a 10 amp fuse, it would have to be a really low ohm reading to ground like just a couple ohms. If this is too much for you, this modification has become so important that gauge of wire run to match the amp draw of both pumps though and the relay size as well. I would remove the fuel level sender and see if you tank is crudded uo, one reason the pumps pull to much load. Two thirds of all pumps in operation today use up to 60% too much energy. The 20AE recall, is a new part (based on part number) and is different from the one installed from the factory. Oh, and that last one was accompanied with a few pictures, like this. 2008 E92 BMW 335i M-sport Oct 01, 2016 · How much current does fuel pump require? If a couple 100ma then 1N4000 series 1amp diode. Bad news, we were 1000 miles from home. If you have a small battery (RC car battery works nicely) for testing, use the outer connections on the cover to the fuel pump to see if the pump operates when you apply current. I would recommend bench checking it with an ampere meter. I decided that it would be nice to have an engine run-in stand. Our fuel pump is kind of compact (38mm OD). 2> Dynamic head. If you open the hood and find that everything is covered with gasoline, don’t try to start the engine! Gasoline is too flammable to monkey around with. I would also carefully look at the condition of the fuel hoses going from the pump to the plastic tubes running trough the tunnel to the engine. It is the way the current is being drawn. In theory, an electric motor such as a fan or an electric fuel pump may have a higher amperage draw as it goes bad, but since you rarely know what an accurate “good” reading is supposed to be, this can’t be considered a definitive measurement. jetmech, Originally the car was fuel injected. 2. The workshop G-Scan showed fuel pump control Replaced fuel pump that is had 140 klms. More than likely the fuel pump drawing too much current and popping the fuse. 9A. With outside air temps in the 110-125 degrees the under hatch temps get real hot. Any wiring shorts to ECU. The factory fuel pump wiring and electrical components were engineered for a fuel pump drawing ¼ to ½ the current. 7 A. The harness coming from the body harness running to the fuel pump itself is 18awg wire. Long x 5 in. If so, the pump current draw may be within specifications during the pigtail test. Typically a fuse blows for one of two reasons, a short, or excessive current draw. might be drawing too much current without the engine running or cranking? 23 Apr 2019 “Voltage dropping” a circuit tells you when the circuit is too restricted to Look at the circuits in our drawings and remember two critical points: allowing you to test an electrical fuel pump, lighting system or ABS remember that a traditional test light pulls too much current and can damage the computer. 2 amperes What could be better than a high-quality Ford F800 Fuel Pump offered with an amazing low price guarantee? Purchase from us and save a lot! Carparts. Fuel Pump Wiring Diagrams for 1994 Chevrolet/GMC Pickups With an Automatic or Manual Transmission. When the fuel pressure runs too high, the fuel injectors draw too much current causing the injector drivers in the DME computer to shut down. You are giving it more voltage across the pump, which in turn makes it possible to even draw more amps. I found that the fuel line was empty. , pump could be shorted or the wrong type and drawing too much current. Most EFI regulators are adjustable from as low as 30 PSI to as high as 70 PSI, so those who want 43 PSI for the fuel rail will be able to use the same pump and regulator combination as those who want 60 PSI. Is the fuel pump shorting out, or drawing too much power? If so, which would be causing this, the internal or the external pump? It works fine until the fuse melts to the point of not making contact. May 26, 2015 · Your instructor, Dave Hobbs, takes you through advanced testing procedures to determine the current draw of the modern fuel pump, including how to read the current draw, how to determine the exact resistance in the fuel pump you’re testing by way of its unique current signature, using a scope and by using Ohm’s law to […] Apr 30, 2010 · Since the fuel pump is electric, if it is binding up internally that will cause it to draw too much electricity. Apr 13, 2014 · Page 1 of 2: 1994 Fuel Pump Circuit Tests (GM 4. This is what an electrical engineer told me the other day. Pump with too much flow may overwhelm the pressure regulator. For a cable 12 feet long and a current draw of 20 amps, voltage will drop about 0. Here is a chart showing the draw of 1 walbro 255 pump. check the oil pressure switch located in the back of the engine, this will also prevent voltage from getting Aug 31, 2009 · A worn fuel pump could be drawing too much current such that it pulls down the voltage. Since you need the fuel pump back by the tank and at the same level as the fuel or lower, that usually means you're going to have a long run of wire. I just replaced a 15. By having the fuel pump controller also operating It's drawing too much current and causing the relay to kick out. Filters can get plugged up and cause a pump to draw a lot more than 8 amps. The obvious culprit in this scenario would be a faulty fuel pump that’s drawing more current than the typical 10 amps it should. Tommy - I think the excess vacuum is being caused by the fuel pump drawing the fuel out of the tank rather than the vacuum from the intake manifold. Divide the wattage by the voltage to find the current. It looks as if the wire size for the fuel pump circuit from the ECU is 12 gauge. Just run a jumper across the fuel pump relay to get the pump to run and check the amp using a amp clamp. I started with a Carter but the noise drove me crazy (Way too much pump) The Facet is much quieter also the current draw is only 1. You can find several different ones available from AES and other suppliers. If I was going to guess, I would say the fuel pump is bad and drawing too much. All electric pumps push fuel far better than they can pull (suck) fuel. I've tried different Engine Stand Project . Here are some actual traces of what current a fuel pump draws on a range of vehicles --- too bad the closest I can come to a 5. Fuse pump fuse blows. Based on the combination of high current faults and low fuel pressure faults, I would bet it is the pump itself :) Use 14 gauge wire or larger and you should be okay with an 8 amp draw. ) 2 Answers. And powering a wideband O2 sensor controller from the… Read More Ignition Coil Draws Too Much Current : A coil (1-5) is drawing too much current. . Check the pump leads for a hot short to the chassis. It’s the combination of motor torque and the pumping mechanism speed it produces that enable the incredible flow the Stealth 340 is known for. 20 Dec 2019 The fuel pump relay is activated whenever the ignition is turned on. My galaxy turned over fine and started for a few seconds and then stopped. There are other ways of determining if the pump itself is drawing current and running, but that's a little more complicated. A shorted injector coil that draws too much current, a bad injector driver, an ECM that cuts pulsation to the injector due to an overheating problem to keep the engine cooler and clogged injectors are all possible conditions that will set those persistent misfire codes. The fuel pump is drawing too much current or working harder than it should be. Vacuum Pumps Common Problems and Troubleshooting Vacuum pumps and systems are one of the widely used equipment in process plants. Any more, and this indicates a bad fuel pump Feb 09, 2016 · Fuel Pump Features. pin # 85 goes to chassis ground. There are a few other posts concerning this problem. Engine overloaded. 255 liter per hour is way too much flow for a R1200 engineI think the stock pump is 110 lph, which is the same for a 90s Mustang 5. If more use 1 diode from a common common 25a bridge. BTW, I noticed in your forum, people are concerned of the current draw by the EFI (mainly the fuel pump). Fuses disable circuits that are drawing too much current, preventing fires and protecting the components that the circuit serves. VDO makes the stock pump, but I don't know the part number. Oct 30, 2019 · Have a starter amp draw test done to see if the starter motor is drawing too much current. Fuel supply being restricted. being a 20A my money is on the fuel pump going bad and drawing too much current Aug 22, 2017 · So many guys just throw a high current draw electrical device on an existing circuit and call it a day only to find out that fuses blow, wires melt, or the stuff hooked to it just stops working are all signs that the device is drawing too much amperage for the circuit it's wired to. An amperage level above or below the specification indicates a malfunction is present, if pressure is low and amperage is above specification. If the pump runs for a while and then the fuse blows, it is probably excessive draw. Current Draw at max pressure: 14 Amp How to re-wire a fuel pump off a relay to upgrade fuel pump voltage for max performance and efficiency and pull more current and amperage for better flow. Just like water, fuel also has a boiling temp and under higher pressure it makes the temp higher. There is nothing special about a fuel pump relay. So all good now. For example, if the pump wattage is 2,200 watts, and the voltage is 110 volts, the current is 2,200 /110 = 20 Amps. On my 86 300E the relay is behind the battery and a black flap. FassFuelPumps. Injection pump out of time. 5 in. efficiency, you are now drawing 22 amps. 10-11 If the suction head increases, the pump head will decrease to meet the system requirements. pumps negative terminal (should be as close to 0 ohms as possible, 1-2 ohms is acceptable) Or physically remove the ground point and clean it. Improper valve clearance. As the pump begins to wear out, or if the fuel filter becomes restricted, average voltage to the fuel pump is increased to maintain good fuel pressure. 8 volts (the average output for most cars), the current draw will be 500 13. These are usually caused by: A worn-out circuit; Heat damage to the relay; Corrosion; Oxidation on the electrical connection; These problems can lead to several symptoms and complications: Dec 15, 2010 · When a fuel pump is in good working order, it only needs an average of 6 to 9 volts to maintain adequate fuel pressure. I figure a lot of people frequent here. A fuel pump is a frequently (but not always) essential component on a car or other internal If the fuel pressure is too high, the engine will run rough and rich, not Both pumps create negative pressure to draw the fuel through the lines. Too much oil in engine. Not getting any help in the Zuma forum. Wire up the pump W/ a 6. 5 ohms or more of resistance into an automotive If a pump is out of specification and the dram is too high, it can indicate:. Also a stalled 10amp motor can burn out with less then 40 amps, even 12-15 is possible. Well pump horsepower may not be linear with pump flow. Even us technicians perform tests on modules at our own risk. Measuring current to find a parasitic drain and see what’s killing the battery I see that sometimes this heat issue is the pump returning too much fuel all the time. Air cleaner element plugged. Fuel Pump Current. Your pump may be delivering enough fuel but it may draw too much power to do so. M. Dirty or faulty fuel injectors. ) A faster than normal fuel pump, with low current draw, points to a lack of resistance in the fuel flow. A defective fuel pressure regulator letting too much fuel return back to the tank, a worn out pump impeller itself, a clogged suction filter sock, etc, can all lead to a fast spinning fuel pump. 4L vehicle about 6 months ago doing this same thing and it was the coil. P0352 : Ignition Coil # 2 Primary Circuit : Peak primary circuit current not achieved with maximum dwell time. Some how more current is being pulled through the relay than the contacts can handle. If there is no voltage, the relay may be the problem. Motor current is not linear with horsepower. Click to expand If your ignition system shares a common circuit with something motorized -- a fuel pump, cooling fans, power window motor, starter, etc. Any Solenoid (VSV) or ISC connected to ECU that is shorted. Electric motors when starting draw a lot more current than when running. The best way to test a relay is to simply use a jumper wire to bypass them. Find low prices and free shipping on all FASS Fuel System aftermarket diesel fuel pumps here at www. Bad ECU. However though, you may have a really good battery to compensate for that. While that 10 percent loss isn’t the end of the world, it may make a difference in your pump choice. 8 to 2. While your doing that, it pays to ensure you have a good earth too, either measure for continuity to the chassis from the . Good news is the Certified used warranty paid for replacement of the pump, relay, block and harness. Replacing the Fuel Pump in a Kipor IG2000 or McCulloch FG2000 Generator A rebrand of a knockoff Honda generator, obtained used, for cheap, has problems! I'm entirely unsurprised (unlike most of the rest of the country, right now). 18 gauge wire is rated at 10amps. Relays are a way to use a small or low voltage signal to close contacts that will pass a much higher voltage or current. Engine knocks Low engine speed. Oct 28, 2008 · you have a possible short but not telling us the number of the fuse and location of said fuse It's almost impossible to diagnose for you other than saying either shorted wires or a fuel pump drawing too much current Apr 13, 2011 · Pretty much ALL the aftermarket pumps i have set up, i have used a 15A fuse. Anyone with basic electronics knowledge knows that a component with higher than normal resistance draws LESS current, not more. If you have an amp meter, take the fuse out and put the leads in the fuse terminals to see what the current draw is. If you have a spare battery, grab it, hook it up, and see how long it takes to kill the battery from start to finish. It should be approximately 5-8 amps. Keep in mind that a fuel pump may draw too much current if the filter is plugged or the regulated pressure is too high. If you replace the fuse with a higher current rating then its suppose to be, you can avoid the fuse blowing, but it can burn out the malfunctioning equipment or even start a fire. When it leaks, fuel pressure is lost at shut off, and if the engine is warm, vapor lock forms, and the engine will be VERY hard to start. Apr 30, 2010 · Since the fuel pump is electric, if it is binding up internally that will cause it to draw too much electricity. Fuel pump relay current draw specs. 20 Dec 2010 Hi everybody, Does anyone know how many amps the fuel pump is I took a reading of 7 amps at the red wire of the fuel pump relay, is that too much? The OP question is about power draw for a fuel pump and 7 amps is  11 Apr 2013 In order to perform a voltage drop test, the fuel pump must be running. View fuel pump current waveforms. I bought this pump at the local auto supply store because it was in stock (cost $69. I had a plugged vent line on an Audi Coupe I owned, and the electric fuel pump had enough suction to significantly collapse the tank, which had a broad and shallow shape. Jul 27, 2015 · Unless there was something wrong with the fuel pump, and it wasn't putting out enough pressure, putting a new pump in wouldn't give you any performance gains. Maybe it has crap in it or has fulfilled it's life I'd be getting it sorted as upping your safety margin is only masking a more serious problem. It is a switch. High inlet restriction can cause the pump to draw too much current and shut off or behave erratically (this could be caused by an intermittent fuel restriction in the fuel tank or anywhere in the line). On some Fords, the electrical system will continue to pull as much as So if you want to check the parasitic draw on the battery, leave the  The fuel pump/ASD fuse keeps blowing after 5- 10 minutes of idle. Jul 21, 2011 · Electric Fuel Pump to be used for priming purposes only? About a year ago, my '55 Pontiac Safari fuel pump failed , probably due to gunk from ethanol. Usually, a bad motor draws too much current to start and then too little when a connection finally fails. If the engine starts, where it would not start with all injector leads connected, the there is a reason the relay went out to lunchthe current draw from the fuel pump was too greatshould have popped a fuse, but instead cooked the wires~ solution, measure the pump to see if it's drawing too much current, possibly replace that pump if too much current neededreplace the length lol still laffin at devil's response but seriously now, it sounds like the fuel pump is straining and drawing too much current. Oct 15, 2009 · Its actually not a case of drawing too much current. So I did some searching, and found the referance to the test where if the pump is drawing more than 8. Measure incoming voltage with pumps off and with pumps running 3. Always consult a professional repair manual before starting your repair. May 13, 2014 · Saturn Fuel Pump Amperage Draw Test Disclaimer: This video is not meant to be a definitive how to. 0 V8. Over the last three days it has started, stalled, then will not Jun 28, 2015 · Fwiw I running a double pumper with racetronix harness. Delivering the best in quality, horsepower and fuel mileage, for your Dodge Cummins, Ford Powerstoke, Chevy Duramax and Big Rig Caterpillar, Detroit and Cummins engines. It's only "on" a minute during cranking til oil pressure comes up. Replaced Battery , Charge rate 14. Joe Notes : Max Current draw is 20 Amps; Compact (7. In a returnless system, the fuel pump is not operating at 100% of its duty cycle. It draws 1. Pretty much ALL the aftermarket pumps i have set up, i have used a 15A fuse. place to bolt a motor, then fire it up and run it for break-in, tuning, and to find and fix any problems, such as leaks, before doing the final motor installation. If the contacts are welded together then your pump is drawing way too much current. The fuel pump relay can help isolate noise from coils and injectors from the main ECU power. I see that sometimes this heat issue is the pump returning too much fuel all the time. Electric motors always draw a certain amount of wattage, or amperage multiplied by voltage. units while maintaining the same flow rate at working pressure to reduce operating temperature and extend the life of the unit. Hello-So I noticed my fuel pump seems louder than I remembered it being when I last had my car on the road (2 years ago). But like a fool, I let him replace the fuel pump for over $600. If a fuse blows, or the relay fails, you'll know pretty quick. (like your dist block) pin # 87 goes to the pump. Hello everyone, I have a 89 Firebird 305 TBI, fuel pump is not a test like at the pump plug, the tester light came on but very dimly, Alternate possibility, though a long shot in this case: Fuel pump drawing WAY more power than it should. If there is a battery drain with the new module installed then look at the Fuel pump itself which can draw too much current and cause problems. Somewhat expensive, in the $200-$400 range. Otherwise? I should have known better. 7L). I am not responsible for V=IR will not work with a fuel pump. My Dodge Magnum with KEY ON draws around 1. If the operating fuel pressure is 3 Bars, a residual pressure of 1-2 Bars might be expected, and must not be lost before 15 minutes or so have passed. Invalid value '0' for parameter userid in method vB_Api_User::fetchProfileInfo . 23 Sep 2019 When deciding what fuel pump to use, it is very important to know how they compare to one another. fuel pump voltage. If so, the problem is the fuel pump pulling the output voltage at the coil terminal too low and crashing the igniter. Once a fuel pump is drawing too much current does that mean its fuxored? Collapse. Reply if a fuel pump draws too much current its fuse should blow battery and the test cables were the correct size the fuse would have blown if the pump was drawing too Apr 13, 2011 · Most Automotive pumps will be fine on 10-15A fuses. Jun 28, 2012 · You are blowing fuses because you are drawing too much current. 24 volts using a 10-ga cable, about 0. Read and report motor nameplate data – HP, FLA and SFA Total Number of nozzles Voltage Static machine off Leg 1= Leg 2 = Leg 3 = Voltage Running – all pumps running Leg 1= Leg 2 = Leg 3 = Amp Draw – Main pump Leg 1= Leg 2 = Leg 3 = changed fuel module as you suggested and discovered a fuse blown, a 20 amp ECM-1. Also, some after-market relays can be less reliable than others, so it’s worth seeking out a genuine Porsche-supplied item. You should hear how healthy it is running on bench. Changes in pump flow may change the dynamic head that will change the relationship between flow and horsepower. However, once the fuel pump is running and the pump is drawing 20-30 amps, those 5 wires can not carry that load and the pump will not run at the RPM it's suppose to. 1955 Pontiacs have a 12-volt system. Oct 09, 2012 · If they check out okay then it looks likely that the pump is dieing and drawing too much current. 66 in. Then the dark green wire with a yellow stripe feeds the power from the contacts to the fuel pump. I would recommend using an inductive amp clamp and measuring how much current your fuel pump is pulling during operation, that should allow you to isolate if it is a pump drawing too much power or an EKPS module wigging out. A failing pump (or any electrical motor) can have the same overall current draw as a new one. To replace the pump you must raise the truck up and remove the fuel tank. [how to unplug Fuel pump relay] Fuel pump wires grounding to the frame under car (common). com The site has been updated in the background Oct 05, 2012 · If the fuel pump is drawing too many amps, then it will burn out the fuel pump relay. (spikes,dips) Which can very easily be spotted in a current ramp test. However, if the fuel pump receives too much current at once; the delicate . Here's a picture of the different relays found behind the battery with their bottoms up This is how they're found behind the battery too. The same power fuse also feeds the fuel pump! Now, though many don't realize it, the fuel pump is rather inefficient electrically! It typically draws 5 to 7 amps when running! That leaves us with 10 amps for the PCM and the PMD. Fuel line pinched or kinked. Also the stock pump is made to run on varying voltages. Of course it could be a frayed wire somewhere too that a mouse chewed. FAQ - EFI Fuel Pumps. The highest I saw, while in the business, was just a tick over 90PSI, Also if there is corrosion inside the wire or the gauge of the wire is too small, poorly crimped terminal and poor terminal fitment all can show excessive voltage drop. The pump does not draw enough from the tank to supply the engine through the fuel system. Ideally, the fuel pump should be powered ON using the same wiring that's used during normal operation. Just hoist that white flag and get help. P0351 : Ignition Coil # 1 Primary Circuit : Peak primary circuit current not achieved with maximum dwell time. It doesn't sound too excessive. Alternately, you can use a square 9V battery with a couple of leads from it. That's perhaps 130 watts of power. It would appear all symptoms are gone and it was either (or both) the wiring to the fuel pump (forsure) or the pump was drawing too much current and caused the wiring problem, but in either case, it appears to all be fixed Feb 01, 2000 · If pump electrical draw is too high, a fix now will head off a future breakdown. I am dealing with my first two wheel EFI vehicle - a 2011 Yamaha Zuma 125 with 3400 miles on it. That's why it would be nice to get the total amperage figures for the above equipment. While your doing that, it pays to ensure you have a good earth too, either measure for continuity to the chassis from the But this was the pump that really changed the landscape of single pump systems and started to open the door to further options. Run the pump while out of the tank, just put the pickup in a supply of fuel, plug the end of the pressure regulator. I disconnected the fuel pump and sender but that apparently wasn't the problem. The All Balls Racing Complete Fuel Pump Module includes all necessary parts to replace one fuel pump module. Sometimes the problem is too much fuel. Disconnect on fuel injector connector and attempt to crank the engine. 4> Motor load dependant losses. Eng wont start while doing this, car will only restart when left for a while. Restores lost performance on broken or poor functioning fuel pumps. You must retest after replacing a motor to confirm correct current draw to prevent another failure. Mar 17, 2010 · A bad fuel pump can draw too much current as its friction increases. It starts throwing code 43 and 46. 8 = 36. If we had the voltage booster between the pump and the fuel pump controller, the fuel pump controller would have to operate at these elevated current levels, causing heat and other reliability related problems. You have to ignore; 1> The pump curve. Most cars at KEY OFF draw around 15 - 50mA. Bad ECU Main relay. 3. You could put an indicator lamp on each pump. fuel pump drawing too much current