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Car wont rev..

F

firehawkchick55

New member
My '99 gtp will not rev past 2500rpms. It jerks, bucks, goes up and down during driving. There is no power. With very little throttle driving is okay. The car idles perfectly. When trying to rev the car the motor shakes and sounds like the supercharger is falling apart.

The car through a po300 code (multiple cylinders misfire).

The fuel presser is 42 at idle and goes up while accelerating. I switched the coil packs and ignition module and the car still runs the same.

Any other ideas?
 


what makes you think its the computer? jw

i just bought this car for a daily driver less than a year ago and i dont know much about them. are they known for the computers going out?
 


my cars been down since tuesday and i live in chicago and the first snow storm hit tues and wednesday so there is no way i can drive my trans am so im stuck at home until its fixed :(
 
firehawkchick55 said:
My '99 gtp will not rev past 2500rpms. It jerks, bucks, goes up and down during driving. There is no power. With very little throttle driving is okay. The car idles perfectly. When trying to rev the car the motor shakes and sounds like the supercharger is falling apart.

The car through a po300 code (multiple cylinders misfire).

The fuel presser is 42 at idle and goes up while accelerating. I switched the coil packs and ignition module and the car still runs the same.

Any other ideas?
Click to expand...

Might be a completely shot intake gasket or head gasket. How does your engine oil and coolant look? Did you just get it, or have had if for a while? I bought my GTP with a miss. Oil in the coolant. Bet a friend. He said intake gasket. I said head gasket. $500 bet FTW! lol
 
the car ran perfect the night before this happened. i shut the car off like i normally do and the next day this is what i woke up to.

i just changed the oil yesterday and it was fine. the coolant is fine and there is no oil in it.

i've had the car since april or may i think im not exactly sure it could've been june lol
 


new intake gaskets a month ago. car is not overheating so it cant be the head gaskets, no coolant in the oil and vise versa. i was told it could be a front main seal, oil pan gasket, timing cover gasket.
 
but it runs perfect. just oil all underneath the car. ifit was a head gasket it be all under the hood on the motor.
 
oh car is still running strong and gr8, no issues but the oil leak. blown head gasket, it b running like crap, throwing misfires cause of bad compression.
 


i wonder if mines the headgasket..

oh i just thought of something...

do you think it could be bad fuel? i just filled up the night before all this happened?
 
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