95 Grand Am Bad Idle

[gmack221]

Originally Posted by MCYTWO

SORRY BUT MY PROBLEM HAS NOT BEEN RESOLVED YET. DO NOT KNOW OF ANY MORE ITEMS TO CHECK OR REPLACE. THINKING OF HAVING IT TOWED TO A DIAGNOSTIC PLACE AND RUN FROM THERE.

MCYTWO you have me stumped, the only thing I can tell you to check would be the timing, takes time, but thats free if you want to look into it, the key on the crank should line up with a marker on the block, and the cam shaft sprockets have holes in them an m8 (i believe) bolt goes thru into holes in the cam housing (if everything is in time).

the only reason I could think of you have good compression and the timing could be off is if the exhaust valves are staying closed longer then they should, but im not positive that can happen.

last winter I completely rebuilt mine, every part came off, and it bothers me I can't think of anything else for you to check.

maybe I just thought of one thing, on the timing chain (accessory side of the motor) there is a rubber hose that runs to a black plastic box (mounted on the intake) that is your PCV hose, if by chance that hose or PCV box is clogged up it might be choking the motor.

last thing I can think of is cleaning your idle control motor (not sure if we mentioned that yet or not) its on the thoratle body, should have 2 screws holding it in, and an electrical connector attached to it, should be on the top side of the thoratle body. (by the way don't twist the end of the motor or you will end up buying a new one like I did)