I had the head gaskets replaced and re sealed a valve grind and the exhaust gaskets replaced as well as having the heads machined on my series 1 buick 3800i and since the car has come back whenever i rev the engine above 3.5k revs when the needle drops back down the car will either cut out or some strange grinding whiring sort of noise will come from near where the throttle body is. the car will cut out alot when its cold but not so much once its been going for a while and will 'stall' if i rev it in park, neutral, or any driving gears above 4k revs.
How would i identify the problem? Ive been reading the posts on here and its seems to be close to an air leak or cas or dfimodule or even the fuel pumps or coils.
Can anyone help me identify the exact problem? i dont have enough cash to fix all the possible issues and then find out nothing has changed.
Come on down and see the idiot right here.
You aint up to Fudge all buddy