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I have 2002 audi a4. does not start. engine cranks but seems like there is no power going to the fuel pump, when bypassed the relay and directed the fuel pmup it does run but car still did not start... there is also no fuel pressure, there is spark, the wiring near the ECM all seems fine do i need to replace the relay or maybe its a clogged filter or is it a security issue that has been breached that is not sending power to the fuel pump really confused please help

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  • Expert
  • 59 Answers

Check inlet hose from tank for leaks , check for obstruction , or collapsed hose check tank pickup . Try pressure testing pump output for proper pressure check injectors ....

Posted on Jun 11, 2017

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Posted on Jan 02, 2017

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keemo68
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SOURCE: 1985 Volvo 240 no fuel no spark

well first the fuel pump relay is bad, that is easily replaced. next you have no spark. the first thing you do is take the cap off the distributerand crank the engine. if it spins that tell syou thyat at least the tang or gear on the shaft of the distributor is ok and not broken. next thing is remove the #1 plug and use a 1/4 drive extension 6" long and turn the crank by hand until the #1 cylinder is top dead center(put the extension in the hole of head where the plug was and you should feel the top of the piston also make sure you can feel the top of the piston with half the extension this way you don't drop it in the cylinder with the piston at TDC(top dead center) the rotor of the distributor should be pointed at the #1 firing position. IF it does not that means your timing is off and you need to retime it by taking off timing cover and either replacing the belt/chain or gears. now if you do not have a distributor and you have a coil pack there could be only 2 things that won't give spark. either a bad coil or your altenater is bad(the battery is responsible for starting not running the vehicle like alot of people assume. the altenator energizes the coil which inturngives spark. hope this helps you please rate this thanks

Posted on Sep 07, 2008

c17hydro
  • 2984 Answers

SOURCE: 1993 BMW 740i not starting, fuel pump location?

Check this:

the fuel pump relay in the trunk on the left side (pasenger)it's right underneath the plastic housing on the inside of the trunk on top of the rear wheel mold. The relay is a 5 prong relay light green in color....... hope this helps, let me know if you found it.

Posted on Mar 17, 2009

daves944
  • 1050 Answers

SOURCE: Buick Regal dying

You have a problem in the fuel pump relay circuit for sure then. I'm betting the relay, but it could be that dropping resistor.

Posted on May 11, 2009

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SOURCE: 1999 Saturn SL2 DOHC Engine - Fuel pump not pumping fuel.

replace engine control module

Posted on May 12, 2009

  • 220 Answers

SOURCE: Car starts then immediately idles down and shuts off

i have had the same problem at times. my car would start and then shut off. but i found that i needed oil and check my oil and it was a quater low put in some oil and everything went fine i notices that everytime the oil is low the same thing happens also depending on the position of the car being park meaning that if you are in a down hill position or up hill position i will do the same. so you have to accelarate for 1 minute to have the oil go up. i hope this works

Posted on Jun 18, 2009

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My Audi A4, 2.4 1998 model. Does not want to start it seems as though there is no power going to the fuel pump. Any suggestions please.


You checked the fuel pump for power and verified there is no power to the pump? Remember the pump only runs for about 1 second unless the engine starts.

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Have you checked the fuel pump relay to see if it is sending power to the pump ? The computer grounds the relay when the computer "sees" oil pressure or engine RPM.

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bad fuel pump most likely. Do a fuel pressure test. On most cars when you turn the key on you hear the pump humming in the tank before you crank the engine. Most have a relay as well which may be the culprit(a lot cheaper and usually easy to find and replace). Pray it's the relay.

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