Question about 2001 Buick LeSabre

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2002 Grand Prix will start fine but then has no power in drive.

The car in question is a 2002 Grand Prix GT with the 3800 and no supercharger. It has 95,000 kms. My wife was driving down the highway and suddenly the car stalled. She pulled over and tried to restart the car but it wouldn't go. She waited about 10 minutes and then it started up. She was able to get it home but the engine appeared to be performing less than perfect. I took it out and it started fine, idled fine and would drive fine at idle speed. When I accelerate, the car begins to bog down and then if try to push ******* the gas it will not go past 2000rpm and does not shift. If I let go of the gas it will shift. Even in second or third it will not go past 2000rpm. If I play with the gas pedal I can get it to start a loping jerking back and forth motion and I can hear a sound like a rhythmic ugh ugh. The fastest I can get the car going is about 80km/hr and that's only if I have a long run at a slow increase on the gas pedal. Going uphill is very slow.

I removed the MAF connector and took it out but performance was about the same if not worse especially at idle. There is no MIL on and I borrowed a OBDII code reader ad there are no DTC's. Is it possible the sensors could be bad but not trip the MIL? As well, will a scan tool at a shop be able to detect any problem with the sensors better than a code reader?

In the past, the car has occassionally been hard to start shortly after being shutoff on a short 15 minute trip. It will crank on these occassions but no start. Again, waiting 10 minutes always started the car.

Any ideas??

Thanks.

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I would also check your fuel pump. Can you hear the pump running in the back of the car when you turn the key to on? If you can't or the pump is not running smooth, then chances are that is your problem.

Posted on Mar 27, 2009

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This problems sounds like it lies in your fuel injectors, this is a commen problem, What i would do:

when the car is almost empty, put 3 bottles of fuel injector cleaner in it, let it sit and run until it runs out of gas. Do not attempt to drive the car. put just a couple gallons or 4 litres of gas back in it and let it run for 5 minutes. then see if it goes back to normal running.

if this does not work, then more than likely your fuel injectors are bad.

Posted on Nov 26, 2008

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There is a part called cam sensor( helps comp. to tell when to fire plugs,also helps with timing). also check the throttle position sensor.

Posted on Nov 26, 2008

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