Question about 2004 Pontiac Grand Prix

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When I first start the car after being left for a while, overnight or just for an hour or so, it won't start unless I touches the gas pedal slightly. I just had a remote start installed hoping to take care of that but it didn't do it. Once the car has been started you can shut it off and it start properly with the key or the remote start.

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It sounds like you've got to have your TPS(throttle position switch) checked by an autorized dealer(not an independant) for faults. If that proves to be okay check the fuel pressure control regulator(if utilized) for consistency. Thank you, Dana

Posted on Oct 04, 2009

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My 2005 Ford Focus won't stay running unless my foot is on the gas. It starts just fine & the check engine light is NOT on. What could be causing this?


It is likely that the engine management system has lost its base line calibration. If the battery is weak and during the crank to start the voltage dipped low enough the Engine Control Module lost its calibration. If the pedal is depressed during the crank the TPS (Throttle position sensor) will lose the idle position for the throttle. The hunting and surging and resultant stalling is the ECM seeking out the limits and re-establishing the throttle idle plate location.

If battery is OK than running the car allowing the calibration of the vehicle to reestablish itself will correct the problem. My experience is that this happens if the gas pedal is depressed during crank with a very very low battery voltage. Always the best way is to not touch the pedal during any cranking starting procedure. Or after a battery replacement.

To accelerate the calibration process attempt to run the car ingear tring not to allow the car to stall. After afew munites the car will have reestablished its normal running calibration and you will be allset.

Nov 28, 2015 | 2005 Ford Focus

1 Answer

Do i need to relearn the tps on a 1999 vw jetta


Unhook battery, press brakes to de-power everything. Leave unhooked for half hour or more.

Re-connect the battery. Turn key to on position. Do not start the car... just to on. Don't touch the gas pedal at all. Leave for ~10-20min.

Turn key straight to start and start the car. Do not touch the gas pedal. Let idle for ~10min without touching anything.

Turn off car. Restart, drive. It might take a few heat cycles and a bit of driving before the ECU 'learns' everything over again.

Jul 10, 2015 | Cars & Trucks

1 Answer

Why will my 1998 chevrolet cheyenne not start unless primed after sitting overnight


by primed are you supplying a fuel source if so then the car is not getting fuel to burn. this indicates your fuel pump is bad and needs replacing and change the fuel filter also. the reason the pump won`t work sitting overnight is that the pump can`t build up enough pressure possibly because the fuel pressure is not being held, but after the first start up the system can maintain enough pressure to start through out the day. you can have the fuel pressure and volume checked with a gage when the problem occours to verify.

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1 Answer

96 chevy blazer won't start.


I'm following another issue like this on a 1996 Jimmy.
This engine requires 60psi or more fuel pressure to run.
You need to have someone check the fuel pressure at the rail- throttle body with a gauge.

Jun 29, 2012 | 1996 Chevrolet Blazer

1 Answer

My van sedona 2005 after i stop it,it won't restart unless i press a few time on the gas pedal ,and also runs rough a bit what could be the cause of it.


May be the starter or fuel pump. Might not be getting gas after turning it off. the gas may be settling to fast into the fuel pump and none staying in the engine. My friends SUV does not start unless you pump the gas pedal. Not an expert but its what i know it could possibly be.

Apr 23, 2012 | 2005 Kia Sedona

1 Answer

1988 22r pickup have to pump the gas now before starting 15 to 20 times. i didnt use to have to pump the gas before every start if it sits more than 10 hours it wont start unless i start pumping the gas...


Seems like the choke is not turning on. The 22r uses a carb if I'm not mistaken. pump it a couple of times then try pressing the pedal completely down before trying to start it. Then press the pedal half way down. the point is to set the choke when you press the pedal all the way down.

Oct 31, 2011 | 1988 Toyota Pickup

1 Answer

Audi A6 Starting problem


Try starting without touching gas pedal

Oct 04, 2009 | 2000 Audi A6

1 Answer

Car starts fine, but stalls at stops and takeoffs occasionlly


Most likely it is running too ritch. should be around 7%. Mine did ecactly the same thing and I had several things done . Had the throttle body cleaned and installed a O2 senser.runs great now.

Hope this helps

May 14, 2009 | 1993 Oldsmobile Cutlass Supreme

1 Answer

Car won't start!!


AmyLynn001, 1st thing, let the car sit for a couple hours (because u smell gas, it's definitely flooded). Turn the key to start (do NOT touch the gas pedal!! Cars are designed now to start w/out touching the gas pedal. If u do, u will flood it, and make it even more difficult to start) When u turn the key, only hold it to turn the engine over for no more than 10 seconds. If after the 10 seconds it doesn't start, turn key off, wait about 10 seconds, repeat. (this is to reduce wear and tear on the starter, and to not run the battery down real quick). It sounds like several problems coming together caused this. U state that the car needs a tune up, it's likely the overheating, need of a tune up (car not performing to optimum efficiency) and pushing on the gas pedal, resulting in flooding, all came together to create this no start condition. Eliminate any one (preferably all!) and u should be able to start the car. So, hopefully just letting it sit and not touching the gas pedal while attempting to start will be enough to get u back on the road, then get that tune up soon. Let me know how u make out.

Nov 03, 2008 | 1997 Saturn SL

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