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I bridged the fuel pump but no luck I let the car idle for almost a hour but can't drive or it cuts out I've also checked all fuses and relays and done two ecu checks but no faults found

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  • Cars & Trucks Master
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Swapping the ecus is ok and it
sounds like you have a diagnostic scanner

could be injector pulse being shut off

Posted on Apr 16, 2017


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Posted on Jan 02, 2017

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SOURCE: car will just turn over

main relay contacts get burned up...... common on the hondas its under the drivers side dash

Posted on Oct 10, 2008

  • 78289 Answers

SOURCE: Fuel system of 94 olds ciera 3100

the fuse is marked ECM 1 or ECM 2 and is under the hood, as is the fuel pump relay, also these have fuel pump connector problems, did u carefully inspect the pins for heat damage?.

Posted on Jun 05, 2009

  • 426 Answers

SOURCE: 1991 dodge dynasty 3.3L-no power to fuel pump & replaced 2 things

the auto shutdown relay is usually right next to the fuel pump relay and there will be a starter relay and fan relay also.

Posted on Jun 20, 2009

  • 1 Answer


I have a 2002 GTP that did the exact same thing, it just stopped while i was driving down the freeway. I had to take it to a local GM shop and it turned out to be a short in the wiring harness. They charged me $250 to fix it.

Posted on Aug 17, 2009

  • 1 Answer

SOURCE: no spark no fuel no start! replaced and checked

funny thing is I have a 2002 GTI with the exact same problem. have spent the last three days at work trying to figure things out.. best of luckn email me if you figure anything out.

Posted on Mar 19, 2010

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Mercedes 1987 190E 2.3 serious starting problems. When starting cold at first took 20 to 40 seconds to turn over and would not hold idle without foot on gas. Now only starts with starting fluid which I...

Have you checked your OVP relay? They can be troublesome for sure. It's located behind the battery under a plastic cover. It'll be the tall relay with the aluminum housing, has a fuse on top, check the fuse first. If the fuse is good then pull the relay and give it a shake, it's not supposed to rattle, good sign it's bad if it does. Sometimes moisture can get back there and cause corrosion to the relay pins and connector. If it pulls out hard then I'd suspect to see some corrosion, most all mercedes electrical connectors are silver plated and turn black when oxidized. If so clean it up by lightly scrubbing with a scotch pad. I've had problems with them before and had luck repairing them myself by removing aluminum shell and reheating all the sauter on pcb carefully. If the printed circuit board looks burned in any way there's a possibility that the electronic components may be toast. May be easier to buy a new ovp relay but they can be pricey. The OVP relay is one of a few possible culprits to your issue, best case scenario imo. Worse case your cylinder compression is too low. Could be a cold start valve issue too. Hope this helps.

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Fuel pump won't run unless engine is cranking, but won't start

Are you sure it's running when cranking? It should have come on when key turned on.
This is for camrys up to year '91. It may apply in your '95, also. Check the 7.5 amp ignition fuse and the 15 amp EFI fuse and the EFI main relay, all located in the fuse box next to your battery. There is also the circuit opening relay tied in to fuel pump operation. It is usually found under center of dash. It is usually not the problem, but it is part of the checks for fuel pump operation.
If your car has a " check connector" or "service connector" (also called a fuel pump check connector) under hood on driver's side near the firewall (a little 1 inch cube with a cap on it), then bridge terminals +B and Fp with a jumper wire. Turn key to on (don't start car). The pump should come on. Listen for fuel return noise from the fuel pressure regulator, and verify pressure in hose from the fuel filter. If nothing, check those fuses above. Here is how power runs to pump: Battery to 40 amp main fusible link-to 15 amp EFI fuse-to EFI main relay-to circuit opening relay-to fuel pump-to ground. Ignition switch and the computer (ECU) work the relays to pass power to pump. Hope this helps some, Randy. Good luck.

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1999 hyundai sonata cuts out after 5 miles of driving, we have wait about an hour and it will restart. We have replaced the fuel pump and still the same problem. we were told there was a fuel pump sensor,...

To me this sounds more like a IAC (Idle Air Control Valve) or your MAF (Mass Air Flow Sensor) is bad and not reading correctly. The fuel pump sensor is an actual relay that you saw, its goes into the fuses. Not really sure what someone told you that it was, due to the fact that you do not have a sensor. Do you have any check engine lights on?

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Been spluttering on start up at any time and weather conditions. now it wont start at all,it is turning over ok and had used it 1 hour before it wouldn't start.i've checked the plugs/leads and...

If you've ruled out all electrical issues (i.e checking all fuses, relays and for spark) then the problem will be fuel or air related. Either air isnt getting into the intake due to a blockage, esp @ any idle speed control devices. To check if thats the issue depress the throttle half way whilst cranking. If that doesnt do it then you're looking at a fuel issue, including lack of pressure comming from the pump, blocked injectors or a kinked line. To check if there is fuel pressure find the fuel line quick coupling and using a rag carefully undo. If there is pressure it may finally be the crankangle sensor which allows the fuel pump to continue pumping. Checking that requires an oscilloscope (auto electricians tool).

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mike42353 it is called a fuel inertia cut off switch,first thing i would look at is the fuel pump pressure if there is none check the f/p fuse if that is ok check for power at the fuel pump if no power at the f/p find your f/p relay it will be in the main fuse box in the engine bay remove relay bridge the power terminal with the f/p wire if pump works it should be the relay ,after that if you dont here pump working you need to get it checked out with a certified tech,regards agwbk

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