I have a 94 buick
park avenue that has an idle problem. I recently had the harmonic balancer replaced and ever since it likes to idle high and hold high rpms during driving or sometimes when it gets down to normal rpms either by itself while idling or when i come to a stop it starts to struggle and a couple times it has died. I have looked at all the vaccum lines and they are all attached so i checked the accelerator arm and that seems fine. Looked at the intake manifold and everything seems fine there. I do know i have an exhaust leak from where the donut gasket goes but that was like that before the balancer replacement and it didnt have this problem. Any ideas, maybe harmonic balancer on too far or not enough? Also it doesnt want to communicate with a scanner. Also i dont have a service engine soon light on anymore.