Question about 2003 Pontiac Grand Am

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Sometimes you can tell that fuel pump is working just by turning key to on position. Changed the pump relay sometimes works . What is possibility that ignition switch could have a bad connection ? Is this typical of some grand am ?

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The engines oil pressure switch activates the fuel pump upon turning the ignition to the ON position..Replace that next

Posted on Jun 06, 2010

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Posted on Jan 02, 2017

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2 Answers

I have a Ford Expedition XLT with a crank no start I changed the fuel pump and check all the fuses can somebody else tell me what may be the problem


A "crank, no start" condition is usually because either gas or spark has been lost. You changed the pump, but now you need to verify that gas at the proper pressure is at the engine's fuel rail. You would need a fuel pressure gauge tester for that- Autozone and others loan them, too. Or, do you hear the pump turn on with the key cycled to on, not start? It should turn on for 2 seconds to pressurize the fuel lines and the fuel rail. If it turns on, probably at proper pressure since you have a new pump, but never hurts to check the pressure. If it doesn't turn on for those 2 seconds with key in ON, then you will have to diagnose the fuel pump circuit. Post back for that.
Next thing to check is spark. Buy a simple spark tester at the parts store (real cheap) and hook it up to a spark plug wire, crank the engine over, and watch for a strong blue spark. Good idea to check more than just one plug wire-sometimes a bad coil will lose spark at a particular cylinder. If you have good spark (a blue, snapping spark), then assume the ignition system is good, and so then you would need to verify the injectors are putting gas into the cylinders-post back if you need to test the injector circuit.
If no spark, then the ignition system has a failure-this can be from a bad Ignition Control Module, a bad crank position sensor, or cam position sensor, among other things. Good luck.

Apr 25, 2017 | Ford Cars & Trucks

1 Answer

Trouble starting my 2002 toyota echo I turn the key, hear the i believe fuel pump come on but then nothing. Sometimes it fires right but when i turn it off after running it won't restart


When it doesn't start after shutting it off can you still hear the fuel pump come on? The best way to tell is to take the gas cap off and put your ear next to the filler neck while someone turns the key to the on position. If you don't hear it, it may be time for a new one.

Oct 19, 2013 | 2002 Toyota ECHO

1 Answer

I have 2000 vw bettle, 2.0 auto., starts sometimes and sometimes u have to turn key several times before starting sometimes it will not start for days... i replaced fuel pump and relay ,, crank senc. ...


I've had this problem and it drove me crazy because I had just brought the car and it went ok for the drive home and then I went to start it again and it took ages to get it started. ( hated driving it).. I changed the oil and filter and it started first time every time.. But now have a new problem.. If I knew the problems these cars had I would never have brought one.. It makes a pretty lawn ornament though...

Oct 05, 2012 | 2000 Volkswagen Beetle

1 Answer

I changed the fuel pump.if I turn the key there times it comes on another there times it want.it will try to start but want.when turning the key also sometime it will try to crank sometimes the truck will...


I don't know if Yukon's had this problem or not, but once I changed a fuel pump on a Chevrolet Blazer only to find out that then the ignition switch went bad. I changed out the ignition switch and it started fine after that. Please rate my answer so I get my points for it.

Jan 22, 2012 | 1995 GMC Yukon

1 Answer

I replaced fuel pump and relay switch Sometimes when you turn key you can hear relay switch clicking and pump working then truck satarts, Runs fine . Try start it again and it just turns over , there's...


not knowing what kind of vehicle it is it is hard to tell. some gm cars and trucks have oil sending units that will not allow the vehicle to start unless it has oil pressure. they start going out and sometimes they start and sometimes they won"t.

Dec 08, 2010 | GMC Sonoma Cars & Trucks

1 Answer

After running out of fuel, what is the proper procedure for restarting the fuel injected vehicle?


put fuel in tank. turn key to run position( not start) wait 5 seconds. You should hear the fuel pump running. Repeat. Then start car. If you do not hear the fuel pump hum then it may have siezed due to lack of lubrication from no fuel. Sometimes you can get the fuel pump to kick on if you bang on the gas tank with the palm of your hand_ while turning the key to start position.

Nov 28, 2010 | 2001 Ford Windstar

1 Answer

SOMETIMES MY CAR WON'T START. WHEN I START IT IT CRANKS BUT WON'T START. SOMETIMES I WAIT 30MIN.SOMETIMES HOURS. THEN IT WILL START UP . IT USE TO HAPPEN EVERY 50TH TIME I STARTED THE CAR, BUT NOW IT IS...


When it won't start you have to figure out if it is fuel or ignition related. Are you doing the work? Guessing and buying parts is too expensive! When you turn key is there spark available at plug (spark tester available at autoparts stores $5) Is there fuel? Remove fuel line somewhere in engine, place key in "on" position, fuel should come out. Does this truck have a crankshaft sensor? This tells the coil when to fire. Could the connection be loose? Does the engine have a good ground connection to battery? Some cars have a flywheel sensor at bell housing. Is your entire fuel line clear? New fuel filter? Sorry but no EZ answers.

Mar 09, 2010 | 1994 Ford Explorer Limited

3 Answers

1992 Grand Prix LE


Did you check the fuel pressure at the fuel rail? with key in the on position to activate the pump? If you did and there was no pressure I would first check for the obvious, gas in the tank, leaking fuel from a line, check for flow before the fuel filter, located at the rear of the vehicle near the gas tank. take the fuel pressure line off put it in a catch can and have somebody turn the key to the on position to activate the pump, if it flows chances are the filter is plugged. Also pay attention to the sound of the pump if it is very loud there is a good chance the pump is failing and needs to be replaced. It could also explain why sometimes it dies. The pump is going out of range. Hope this helps

Oct 16, 2008 | 1992 Pontiac Grand Prix

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