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Posted on May 03, 2010
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1999 pontiac grand prix 3.1 starts great but sputters throttling

1999 3.1 litre pontiac grand prix. the car will always start and idles ok and runs great. but sometimes when it starts just barely touching the gas pedal the motor will start sputtering this will not stop. normally let the car sit for about 10 minutes and restart.

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  • Posted on May 09, 2010
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Joined: May 09, 2010
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Check tps sensor check idle air control valve or iacv for proper func

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2001 pontiac grand prix gt. car starts and runs fine for like 5 min max in idle. then rpm's begin to drop and car starts to sputter on the verge of dying.. it then dies short after, it takes a few attempts...
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Feb 27, 2015 • 2001 Pontiac Grand Prix GT
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Where is idle sensor loated on 1999 grand prix
Idle Air Control is on the throttle body itself, small barrel shaped. Can be cleaned if carbon build up on the pintle is the problem.
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Jul 28, 2014 • 1999 Pontiac Grand Prix
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My 1999 pontiac grand prix 3.8 liter stutters between the speeds of 30mph and 70mph at quarter throttle. when i push the pedal to the ground it has no problems, takes off just fine. no check engine light...
Pontiac Grand Prix 1999 Owners Manual Download I've got this link to help you get a long term permanent solution

Go ahead, thank me later !!
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Nov 01, 2017 • 1999 Pontiac Grand Prix
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May 12, 2010 • 1999 Pontiac Grand Prix
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My 1999 grand prix stalls and dies at stops.
My Pontiac Grand Prix is also a 99, it has 216,+ thousand miles on it, it runs great, idles good, I need to replace the oxygen sensor tho as it shuts off on me while driving or sometimes coming to a stop. You might try checking the fuel filter and pump as well.
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Apr 17, 2010 • 1999 Pontiac Grand Prix
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My 1993 pontiac grand prix with the 3.1 engine stalls when it idles at a stop light but it starts right back up. it has plenty of power. we changed the o2 sensor did the vaccum leaks and ths spark plugs....
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Nov 05, 2009 • 1993 Pontiac Grand Prix
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2006 pontiac Grand Prix stalls in wet weather
A cause for that would be an oxygen sensor getting wet, the one on the inlet side of the catalytic converter.
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Apr 15, 2009 • 2006 Pontiac Grand Prix
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Starts and stalls
i had the same problem once before makeshure the gas lines arent coroded or kenked if that dont work try cleaning the fuel injectors.

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Dec 17, 2008 • 1999 Pontiac Grand Prix
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Stalling issues
Here is the most common cause of surges and stalls and low idle rough idle, it is the idle speed control air-bypass valve and throttle valve (IAC for short), they get full of gunk over the miles and cause idle issues (stalls, low idle) like yours, Get a can of intake cleaner from any local parts store, not carb spray, intake cleaner, it is made by a company called CRC, remove the air intake hose to the engine, hold the idle high so the engine won't stall, then spray the can of cleaner into the intake while keeping the engine running, use at least 1/2 the can, shut down the engine and disconnect the battery for 5 minutes, then restart and complete a number of mixed driving cycles, town, freeway, stop and go etc., after a few days the problem will go away as the system will relearn to the clean intake.
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Dec 08, 2008 • 1995 Pontiac Grand Prix
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Idle problem
throttle position sensor is what I replaced on mine. Could also be a short in a wire that controls throttle. That was 6 years ago and it was $100. Took it to a shop, that's all I got.
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Jun 24, 2008 • 1993 Pontiac Grand Prix
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