Question about 1998 Pontiac Bonneville

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Engine only runs when you have your foot on the gas pedal.

The car will start fine and run, as long as I leave my foot on the gas pedal. I remove pressure and the car will stall out.
The car has a new battery, plug, cables, and filters. I had the alternator and battery cables tested about six months ago and they were fine.
What can I do to fix this, its been a problem for about 4 months.

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  • yadayada
    yadayada May 11, 2010

    have a OBD 2 active run test done.

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5 Suggested Answers

  • 1894 Answers

SOURCE: Ford contour stalls or dies, when removing foot from gas pedal

this due to stuck pump

Posted on Jun 08, 2008


  • 54 Answers

SOURCE: ENGINE STALLS WHEN I STEP ON GAS PEDAL

Sounds like your fuel pump is going bad! The more you press on the pedal the more demand is on the pump and it cant keep up cuz its junk. Try to limp it to a shop to replace it, unless u wanna do that yourself.....

Posted on Jan 19, 2009

muttandjeff
  • 359 Answers

SOURCE: No power accelerating or going up a hill

HAVE SOMEONE CK THROTTLE POSITION SENSOR AND CATALYTIC CONVERTER MAKE SURE EXHAUST IS CLEAR

Posted on Feb 03, 2009

SOURCE: Car stalls when you let off the gas when warm or idling

sounds like your IAC (idle air control valve) located on the throttle body towards the front of the engine held in by 2 torx screws. the iac controls the idle if the car when your not on the gas. i will post the steps to clean the iac and the passages that the iac goes into.

1. disconnect the iac connector
2. remove the iac
3 clean the iac pintle valve and check for wear
4. clean the passages that the pintle valve sits in (usually carbon build-up in there, you may need to remove the air intake tube and air filter box to get to the passages in the throttlebody)
5. if the iac looks ok and the passages are cleaned re-install and put everything back
6. start car and see if it idles like normal when warmed up. you may need to give it a few tries for the iac to re-learn its proper position so give it a few warmup cycles
7. if it still stalls check for proper operation of the iac via ohming out the connectors (if you look it up on google you will find the specs at which the iac is supposed to operate)
8. if the iac is working properly, check for vacuum leaks on the intake manifold and vacuum lines.
9. if no vacuum leaks are present and the iac id working properly after cleaning have a shop check the ecm (engine control module) for a bad circuit board, i've seen that haoppen as well

hope this helps!

Posted on Feb 17, 2009

GM Elec
  • 1000 Answers

SOURCE: Battery and Alternator Good. Alternator not working. HELP!!!

djn, I believe you have some accessory that is on when the key is in the off position.
Check to make certain glove box light is not on when the glove box door is closed and the trunk light is not on.
If you have an aftermarket radio or any added accessories make sure they are not wired direct to battery voltage.
If all that checks out, disconnect the battery negative and connect a test light between the battery and battery cable. If the light is on you have a drain in the electrical system. Leave the light connected and begin removing 1 fuse at a time until the light goes out, that will tell you what component or circuit is draining the battery.
Last resort, you may have an alternator drawing the battery down.
Good luck and let me know.
Regards,

Posted on Mar 01, 2009

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1 Answer

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

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Removed battery post now car won't stay started how do I fix it 2003 es 300


All you need to do is hold your foot on the gas pedal to start and hold to keep engine running, hold gas pedal for about 3 minutes then let idle, computer needs to relearn the idle speed thats why it stalls out, hope this helps,

Dec 07, 2010 | 2003 Lexus ES 300

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Car will not start without pressing gas pedal to keep idle speed up. If I keep idle at 900 RPM or higher it runs as long as foot is on gas pedal. It then stalls out when I take foot off gas pedal. No...


Have the idle bypass valve checked, also called idle air control valve.
If that valve is stuck in the closed position, it's not allowing the fuel to bypass the throttle plate to keep it idling, resulting in stalling, but will keep engine running if the pedal is pushed down.

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Wont hold idle will start with foot depressing gas pedal will run with foot on gas but stalls when foot removed


Check and clean Idle air control valve. Make sure its responding to signal as well. Also make sure ther are no vacuum hoses disconnected. This may not be a "cure" but it's a good place to start.

Apr 14, 2009 | 2001 Jeep Grand Cherokee

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My '98 Camry won't stay started. I start it and it just dies not matter how many times I try it. If I leave my foot on the gas it runs but at soon as my foot leaves the gas it dies.


What you have is a bad Idle Air Control ("I.A.C.") valve. This device admist a precise amount of air to keep the engine running at idle. This is a common issue. Get a new one from a dealer, and you will be up and running fine.

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2 Answers

E85 fuel in a regular gas tank


drain the tank change the fuel filter motor will be fine
it'll run funky until the e85 is flushed out

Dec 12, 2008 | 2001 Ford Windstar

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