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I have a 86 vw quantum gli, i changed fuel pump,filter,and relay and when i turn it over it runs for about 4 seconds and dies

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If your car will turn over but then cut off, it's probably a blown fuse to the fuel pump or a bad fuel pump, or more remotely a poor connection between the fuse and the fuse clips, or a leak in the fuel line.


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Posted on Dec 19, 2012

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1988 ford mustang inertia switch locaton


More than not its the ign module in the distributer.. this is the way they fail.. 2. the fuel pump on these cars are a problem too.The fuel pump is in the fuel tank. go to the rear of the car in a quiet area have someone just turn the key to on, not trying to start the engine. if the fuel pump runs it will run for about 1.5 seconds and you should be able to hear it .. it will be a buzzing noise. the relay just turns the pump on for a short time to charge the system then when the engine starts the relay via the computer turns the fuel pump on to supply the injectors. The reset is a cable is in the trunk of the car on the rear right side. it has a plastic tag on it for identification. The problem could be a clogged fuel filter.. mounted just in front of the tank under the car. If the IGN module is out there will be no spark.. check that before you start removing the tank.. I just bought a pump, a filter and an ign module for that car from www.Rockauto.com.. best prices anywhere. Pump was 1/4 of what autozone wanted for it !!

May 05, 2014 | 1988 Volkswagen Fox

1 Answer

I installed a fule pump and started right up, and then stopped runing again, I was going to clean fuel filter, and fuel kept flowing throuule the fuel line. I changed fuel pump relay five times, I...


Maybe the oil pressure sensor or switch that keeps the pump running after engine started.

If you jumped 87 and 30, it should have turned the pump on. If those are the right terminals at the fuel pump relay, and I think they are. Those are usually the right ones.
Try this: one of those terminals should be hot at all times, the feed for the fuel pump. Check for a hot terminal there. If the feed for the pump is lost, it will probably be a blown maxi fuse or fusible link supplying that relay's power feed.
If it still starts and dies, check the fuel pressure. If pressure is at specification, both key on, engine off and with engine running, it could be an ignition problem (crank sensor?), not a fuel problem. But you may be right to pursue the oil pressure switch or the pcm, if the pump was still running as you say at the fuel filter .

At terminals 85 and 86 of the pump relay, you could check for the computer signal on one of those with the engine cranking. With engine cranking, the computer sends a signal to the coil side of the relay, either the 85 or 86 terminal, and the other terminal will go to ground. Do you have a test light or voltmeter?

Apr 26, 2014 | 2002 GMC Sonoma Extended Cab

1 Answer

I have a 86 Toyota 4Runner, it will not stay running. It will start right away and run for about 5 seconds and then die and won't start unless I leave it alone for an hour or so. It cranks and wil


Good explanation of symptoms.Thank you.




No assumptions.
Diagnose problem.
Pinch off the fuel return line.
Check fuel pressure--I don't wanna!PITA!
The fuel pump won't run if the fuel filter is plugged up.
Toyota's have a gas tank drain plug!!!!!!!!!
My '84 takes a 3/8 " ratchet. Cool.

There may be a fuel pump relay that is toast,but I suspect the filter,off hand.
A plugged filter will overwork the pump and cause the engine to run rich.

Feb 20, 2013 | Toyota 4Runner Cars & Trucks

1 Answer

I replaced the fuel pump on my 2004 1500 5.7 liter. Started at first but only ran at idle for a few seconds and died. Now i have no fuel pressure at all. Also the wiring connection at top of fuel pump


gotta start with the color code of the wiring. verify that is correct first. you have to have fuel pressure for it to run obviously so make sure you wired it correctly. Here is the color code according to Mitchell OnDemand
black/orange= ground for fuel pump
orange/red=power on for fuel pump(only gets triggered from fuel pump relay)
dark blue/white= signal to pcm for fuel level
dark blue/ dark green= ref voltage

If that is ok then check for relay activation. Fuse 17 is the power source for that relay. If you have a good fuse but no relay activation you could throw a relay at it but if that doesnt do it then its gotta go to a shop. But if you are curious....
Relay code
pin 30= hot at all times
pin 86= relay control trigger from the pcm
pin 85= hot in run or start
pin 87= power source to fuel pump.(i.e. orange/red wire)

the relay will have numbers on it designating the correct pins. Get that right first then move on to the next. I'll be here. Good luck!

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1 Answer

95 taurus starts runs for 1-2 seconds then dies changed fuel filter 39 psi on fuel rail can make it run longer by cycling ign.switch from off to run really fast but leave it in run and dies after couple...


I would check the EEC relay, and the fuel pump relay too. But it sounds like the ignition module is loosing power, or the pump is not getting power after the engine starts.
The computer must see oil pressure or RPM to power the pump relay after the engine starts.

Sep 07, 2012 | 1995 Ford Taurus

1 Answer

How can I diagnose a fuel delivery problem on a 2003 VW Jetta GLI 2.8L


you can unhook the fuel line where it connects to the fuel rail and turn the key on and see if you get fuel but it's risky you don't want it to spill over the engine. you may just need a new filter or maybe an intermittent short at the fuel pump. could even just be the power supply plug for the fuel pump

Jul 16, 2012 | Cars & Trucks

1 Answer

2002 HD 1500 Chevroley 4WD 4 door truck engin lost power and died could start but when acelarated died max rpm 800 pulled filter turned key on pump shot a stream of gas 3 ft and stoped ran only secon


It is normal for the pump to run for two seconds when first switched on to pressurize the fuel system. It will turn on again when cranking and while running. I would still suspect the pump given your symptoms, however other problems could also give you the same symptoms. If it is the original pump from 2002, or more than about 7 or 8 years old, I would definitely replace it, and the fuel filter. Often the pump will go intermittent. I had one that I could restart and get down the road by hitting the bottom of the gas tank a few times!

Oct 18, 2017 | 2002 Chevrolet Silverado 1500HD

1 Answer

86 Gli starts and runs rough for three minutes with black smoke if kept above 1200-1500 then slowly dies out and won't restart for 30 minutes. Seems to run extremly rich. Changed fuel pump relay with no...


If your light for o2 sensor has been on than the culprit is you need to replace the sensor. The o2 sensor tells the computer to adjust the air fuel mixture, if you have a bad one it will make your car run too rich because the ECM is guessing what the air fuel ratio should be, hence the reason you have all that black smoke. Change the sensor and your car will run like new and save you alot of gas.

May 25, 2010 | 1986 Volkswagen Jetta

1 Answer

94 VW Golf. Starts and runs sitting, drive it about 10 mins and it just dies and won't restart. Have changed Coil, wires, plugs, cranck shaft sensor. Fuel Pump/Filter?


a)When you go to restart it does it die right after restart?
b)Does it die after you put it in gear after restart?
c)Doesn't restart at all?
Not sure if you changed fuel pump? If you did eliminate it from cast of characters.

If a & c engine main relay or fuel pump
If b torque converter clutch solenoid

Apr 16, 2010 | 1994 Volkswagen Golf

1 Answer

Mazda Lantis will not start


What you can do is disconnect the fuel filter and have an assistant watch under the vehicle while you turn the ignition switch (but with out actually turning the engine on. If the Fuel pump is an electrical fuel pump it will spit out fuel for about 3 to 5 seconds.
If nothing happens then a more extensive method to checking the fuel pump


Ok if you could find the fuel pump relay.
It will have either 4 pins or 5pins
This is a trick to activate the fuel pump with out the engine actually running and for longer that 3-5 seconds.
the 4 pins are numbers 85 86 30 and 87 (87a)
If you can remove the relay and memorize where the pins go. Then acquire a bobby pin or paper clip and cross the terminals 30 and 87 (87a) and if the fuel pump activates then it functions but remember to have the key in the ignition with it to the run postion but the engine off. If this works then the relay could be bad, Test Terminals 30 and 85 for resistance.

Reply if you have questions

Jul 13, 2009 | 1994 Mazda 323

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