My grand am gt

Asked by Dianne Jul 02, 2018 at 12:41 AM about the 2002 Pontiac Grand Am GT

Question type: Maintenance & Repair

My gt  3.4  been scanned an said misfire on 3rd cyl
mutiple , it runs but has trouble when acceleration
at every red light i get caught at.  It has a flutter in
idle not loud but kinda feels like it wants to stall
but dont.

7 Answers
1,360

Jeff answered 6 years ago

Either the plug is bad or the could pack is weak. Start by pulling the plug to see if it's dirty. Also check your fluids for change in levels (too high or too low) or color.

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Dianne answered 6 years ago

Okay so it may be the 3rd spark plug. Do you know how many coils i have to change an how many i have

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1,360

Jeff answered 6 years ago

Are those codes off your vehicle, or are you just tossing that out there?

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1,360

Jeff answered 6 years ago

Well if those are codes off your vehicle, with the engine running, listen for a weak hiss while wriggling the vacuum lines between the MAF sensor/throttle body/I take manifold. If there is a cracked or disconnected line, the computer will be adjusting fuel & air mixture based on erroneous data. Same with the throttle position sensor.

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1,360

Jeff answered 6 years ago

Depends which engine you have. I think they came with an inline 4 or V-6. Therefore, 4 or 6.

Mark helpful

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