My car is acting VERY strange.When I shut the car off the guages seem to move up and down alittle bit.And when I start it up(after its warmed up)it takes forever to decelerate when I rev the engine.Anyone have any ideas because i’m stumped.
if it’s the cobalt take it to the dealer
rev prob might be the idle air control
prob the skyline muffler
Exactly, what kind of vehicle is in question?