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Engine or transmission?

5 messages,  Last post on Jul 27, 2010 at 11:02 AM

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What is this discussion about? Pontiac Grand Prix, Sedan

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#1 of 5 Engine or transmission? by smgreen20

Apr 24, 2009 (9:17 am)

My wife and I test drove an '01 Pontiac Montana w/78000 miles and when you went to pass or accelerate hard it would downshift and the RPMs would go up, but it wouldn't move or pick up speed. It just kept going at the same speed, but w/the engine sputtering like it couldn't breath. Told the dealer and they fixed it. It was the MAS and a ?? sensor. Took it out for another test drive and problem solved.
 
Fast forward to today, my wife and I are now looking at an '02 Grand Prix GT w/70000 miles and it does the same thing as the Montana. Does anyone think it could be the same issue? We want to buy the car, but only if it's not the transmission.

#2 of 5 Re: Engine or transmission? [smgreen20] by heffemeyer

Apr 26, 2009 (8:39 am)

Replying to: smgreen20 (Apr 24, 2009 9:17 am)
Have the same thing happening to my 1999 Grand Prix GTP. Seems to happen after the car is warmed up, seems to sputter as if it needs more fuel or air. Originally was thinking it was the fuel pump now leaning towards Mass air flow sensor or Throttle position sensor. Periodically the check engine light would come on but clear after 10-20 miles. Was the problem the Mass air sensor?

#3 of 5 Re: Engine or transmission? [smgreen20] by avo3

Aug 17, 2009 (8:29 pm)

Replying to: smgreen20 (Apr 24, 2009 9:17 am)
This happens to me also, but only if my gas level is low

#4 of 5 Re: Engine or transmission? [avo3] by smgreen20

Sep 02, 2009 (7:53 pm)

Replying to: avo3 (Aug 17, 2009 8:29 pm)
It turned out to be the MAF sensor and something else. $200 fix and all was good. Didn't get the van though.

#5 of 5 pontiac grandprix/3800 by pop4466

Jul 27, 2010 (11:02 am)

when I start the car it runs fine,but when I rev it up it spits n sputters. Please advize what 2 do.
 
                                               Thank You!

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