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I just bought a 1994 camaro 6 speed lt1 with 78,000 miles that had been sitting a couple months without driving. It has an aftermarket intake, tb and mas.airflow sensor. The car has not been tuned since these parts where installed.
The problem is, when going through the gears , hard throttle or normal driving, the whole car studders and shakes and wont rev past about 4500 rpms. I know it has old gas in it and the check engine light came on when driving but goes off when you restart the car. When in full throttle, it is very hesitant and I know it isn't normal.
If anyone has had any experience with this problem or might know what it is/how to fix, I would be very appreciative. Thanks
I would definately lean toward opticrap. That was my issue. I had the same issue about the 4500 rpm nonsense. I would top out at 70 mph. I would first pull the codes brecause my friends car had a bad ground on the block and it acted simular. Sooooo, check codes.
Cycle thru the tank of gas you have now and see if it clears up. Will it free rev past 4500rpm with out acting up? You said it has a aftermarket MAF try and unplug the MAF and see if it gets any better. I'm not far for you and off on monday if you cant get things sorted out.
It will rev past that when its not under load but its not how it how should. Ive gone through 3 tanks of gas and no change the only other things i could think of were the injectors or the plugs and wires.