Question about 2004 Pontiac Grand Am

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No start Vehicle has no spark, and fuel pump doesnt run when key turned on intermittantly. No codes. All relays and fuses good. Owners manual talks about Passlock system disabling fuel pump if wrong key is detected. Is this system related to the problem?

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Yes it is a theft deturant system if your key does not have the right code chip in it the car is useless

Posted on Aug 26, 2008


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4 Answers

If the fuel pump running when the key is turned on,could the fuel pump relay still be bad? If so where is the fuel pump relay?

Fuel pump relay is not bad if the fuel pump runs and anyway it has nothing to do with spark. Relay is in the underhood fuse box.

Aug 28, 2016 | 2005 Hyundai Elantra

2 Answers

Does the fuel system operate off the battery and how will i know if its the battery or the fuel pump

Does the starter spin the engine normally when you turn the key to the start position ? Do the headlamps shine bright ? If any of these work correctlly the battery is fine . If the engine turns over normally an doesn't start an run it doesn't mean the fuel pump is bad either .There could be any number of thing's wrong , testing first electrical circuits of igintion system , fuel system . Hooking up a fuel pump pressure gauge , pull a plug wire an check for spark . I'd say your best bet would be to take your to a qualified repair shop before you replace parts you don't need .

Jul 17, 2016 | Cars & Trucks

2 Answers

I have a 95 Ford crown Vic it will turn over but won't crank,it has half a tank of gas,changed the fuel relays,all fuses good in all fuse boxes but it will not start only turn over I'm lost

check codes first--may find problem there.
check spark on more then 1 cylinder.
check fuel pressure and volume--if fuel filter is stopped up, may have overworked fuel pump. With fuel cap off you should hear fuel pump running (key on) If not running, check for power at sub harness--Lastly tap on bottom of fuel tank with RUBBER hammer while someone else is cranking vehicle--if it starts get it to where you can remove tank before turning off--very often one time deal.

Jan 26, 2015 | 1995 Ford Crown Victoria

1 Answer

My 1999 nissan quest van is like its mot getting gas I put new fuel pump spark plugs cleaned fuel injectors it's still not starting

Can you hear the pump hum or buzz when you turn the key to on? It should come on for a couple of seconds to pressurize the fuel system. If you don't hear it, check the fuel pump fuse. If fuse is good, find the fuel pump relay under the hood. Hold a finger lightly on the relay and have someone turn the key to on. You should feel it click on to power the fuel pump. If no click from the relay, you will have to diagnose the fuel pump circuit. The relay should have power from a fuse link or a maxi-fuse that may be out. The computer signals the relay to turn it on.
Now if you do hear the pump, you would want next to check the ignition circuit: check for spark on one or two of the spark plug wires. The ignition is probably good if you see a blue snapping spark. If weak, intermittent, or orange colored spark, the ignition circuit would need diagnosing.

Jul 12, 2013 | Cars & Trucks

1 Answer

No fuel and no spark

fuel pump , fuel pump relay on fire wall, fuel filter, may all need replaced, pump in tank, inspect all wiring in this circuit, especially all grounds,, grounds get overlooked & that is sometimes the problem. I have a 1988 gmc 2500, I 'm talking from experience. can you hear if fuel pump runs for 2 seconds, when you turn key on ? if not, ground problem or pump problem. relay has a fuse in it, check that. check all fuses. NOW, spark ! coil ? plug wires ? distributor cap & rotor ? replace them if you haven't !!!!!!!!!! get to work, see how you do ! good luck !

Mar 05, 2013 | 1989 GMC K1500

1 Answer

2000 mercury grand marquis 4.6 Intermittent problem. 35,000. miles. Problem engine died several times wile driving. Also after car is parked from a drive will not start. Found that the fuel pump is not...

I'd have to test when problem is ongoing. When you first turn on key, no crank, you should hear the pump run for a few seconds then stop. For initial prime, the computer doesn't need rpm signal. Engine cranking, the computer needs to see rpm signal or it won't ground the fuel pump relay. W/o rpm signal, no spark at the plugs and no fuel injector pulse. I know your talking about fuel, but, when problem is ongoing, check spark and fuel injector pulse, engine cranking.
Intermittent problems are a pain, have to test when problem is ongoing.
mercury fuel pump-i4kx0gxqalhdz4ok10irisui-5-0.jpg

Feb 27, 2017 | 2006 Mercury Grand Marquis

1 Answer

I replaced fuel pump but did not start,poured fuel in the air breather and it stays on until the fums run out.checked the pressure on the rack and there a relay that doesnt work a fuse or is it...

The fuel pump relay is controlled by the PCM which uses the gray and black wires all the way back through the chaissis to the fuel pump. With the key on and no pressure at the rail the pump should be running. If there is no power out of the PCM (Power Train Control Module) to the fuel pump relay the fuel pump will not work

If your looking for the fuse the fuse location is in the FREE owners manual here: (2.62 Mb) Check the IGN fuse.... and the fuel pump relay (page 330)

Some fuses are in a fuse block on the driver's side of

the vehicle, near the driver's right leg. Loosen the screw
on the cover and remove the cover.

Thanks for choosing FixYa,

Aug 01, 2011 | 2004 Saturn ION

1 Answer

1998 ford explorer sport,V6 SOHC cranks but no start.. Took vehicle to get Emissions Tested (Illinois), turned off vehicle, they hooked up there diagnostics, went to start, no start, pushed me outside to...

It sounds like your fuel pump or pump relay died. Have a listen below the driver side passenger door in front of the rear wheel while someone turns the key to the "ON" position. You should hear a muffled whirring noise. If not, then the relay or pump has died.

The relay is located in the engine compartment in a black box in front of the power brake booster. The exact location is posted in your owners manual. Autozone or checker sells them for about $7, That should be your first step before dropping $150 on a pump that you might not need. Besides, replacing the pump requires removing the fuel tank to access the pump , and if the shop says the pump is not getting power, then most likely, it is the relay OR the mini fuse for the relay (Not the fuse on the dash panel)


Good luck.

Jun 11, 2010 | 1998 Ford Explorer

1 Answer

My 2004 F 150 intermittently looses its spark. will not start with the key, but it will start with remote start, but intermittently

Maybe fuel pump issue. maybe crank sensor issue. sounds like it doesnt matter if you remote start or key start. You just have an intermittant issue. If its the crank sensor you should have a code stored even tho the light is still off. If its a fuel pump issue your prabably going to have to do a pressure test to be sure or spray quick start when it doesnt start. If it starts and stalls then you know you havea fuel issue. Try rotating the fuel pump relay with the horn relay. Your owners manual should say which one it is. If not just move them all one space like musical chairs. You have several that are the same. The relays are in the fuse block under the hood and are the larger rectangular ones.

Mar 31, 2010 | 2004 Ford F150

1 Answer

No Power to the fuel pump

Have you checked the fuse for the fuel pump? Check the owners manual and possibly the cover for the fuses. One of these will tell you which fuse is for the fuel pump. If the fuse is not blown you next need to find the fuel pump relay in the engine compartment. Again I believe the owners manual or the cover for the engine compartment relays will show which one is which. After you find the relay have someone turn the key on while you touch the relay. The car should not and does not need to be started when doing this because the fuel pump is energised in the ignition run position, not the start position, to pressurize the fuel system before the engine is turned over. Have the helper do this a few times to make sure the relay is either working or not working. If it is not clicking you may have found the problem, relays do go bad with time, if it is clicking you will probably need to check for voltage with a test light. At this point I would predict that the fuel pump is the problem. Hope this helps and good luck.

Jan 07, 2010 | 2002 Chevrolet Malibu

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