i have a 2004 grand prix 3800 series 3 runs good until you start giving it alot of gas then it feels like somebody has a rope tie to it holding it back already changed plugs and wires did not work

10

Asked by Oct 25, 2015 at 12:49 AM about the 2004 Pontiac Grand Prix GT2

Question type: Maintenance & Repair

7 Answers

64,395

Did you change the fuel filter?

10

no not yet i hope thats it . runs great until you give it alot of gas and then it will stall and miss

1 of 1 people found this helpful.
69,695

There is a mass air flow valve in the exhaust that could be giving you grief, and or the catalytic converter. These are other things to look at...

1 of 1 people found this helpful.
1,555

sounds like a plugged cat converter, you can almost tell by the sound and feel, the engine will sound muffled and the car has a constipated feel

69,695

Sounds like a plugged cat but I had one of these cars and ended up being the mass air flow valve and not the cat. MAF should be checked first.

1 of 1 people found this helpful.
66,045

Especially if you have an aftermarket air filter that requires oil. The oil for the air filter contaminates the MAF. HTH. -Jim

1,555

I agree Jim those air filters that are oil charged cause a lot of problems, People that have them either don't clean and recharge them or I get them with the engine light on and I pull them in the shop and they are dripping oil. I personally would not put one in my car

1 of 1 people found this helpful.

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