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Old 07-16-2010, 07:49 PM
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2000 Grand Prix GTP won't start?

OK guys my buddy's son is going to college well his 2000 GP GTP turbo sometimes turns on just fine then sometimes it won't turn on at all when it's messing up you rev it up to 4000K rpm's and it runs good but once you let go of the gas pedal it starts to miss now some guys at the auto parts store is saying it's the crank sensor but no codes are coming up. Can you guys help us out? Also does it have a timing chain or timing belt?
Thanks! RJ
PS-I'm thinking maybe the fuel pump might be shelling out what is the pressure suppose to be at?

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Old 07-17-2010, 12:38 AM
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had this problem on one recently it was off of a vacuum line cant remember exactly but it was cracked had to pump the throttle to get it to start idled like crap but drove fine
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Old 02-10-2012, 04:51 PM
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eighter a bad o2 sensor or u could have an issue with the intake if its 3800 size engine their bad for getting cracked could be crank sensor
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Old 02-10-2012, 04:57 PM
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sounds like a crank sensor to me.
Next time it wont start, check for spark .If it has no spark it is most likely a crank sensor.
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Old 02-10-2012, 08:10 PM
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2000 pontiac Grand prix with a turbo????I would be looking for some unmetered air behind the maf sensor before it enters the roots style supercharger.
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Old 02-11-2012, 12:07 PM
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Quote:
Originally Posted by fatblock
2000 pontiac Grand prix with a turbo????I would be looking for some unmetered air behind the maf sensor before it enters the roots style supercharger.
Right , they are a roots charger, not a turbo.
an air leak at the MAF wont cause a no start on it though,it starts on base info (ROM) and crank sensor signal, not actual values from components that have adaptive strategy . May be the cause of some of the drivability issue though.
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Old 02-11-2012, 12:48 PM
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I vote for the crank sensor
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Old 02-14-2012, 10:11 AM
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I had a 99 that did the same thing. It turned out to be the water temp sensor. Installed a new one and it ran like a champ again. It's an easy check. Just unplug the sensor. It's on the front of the engine at the right side in under some parts. I can't remember if it was a rad hose or what hiding it. Anyway, when you unplug it the computer disregards the temp sensor and it should run O.K. Just a thought.

Jack
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