I have a 97 Malibu with the 3.1 V6 and it sometimes does not idle just right. It it usually hard to tell but sometimes in drive at an idle it seems to make the car shake just a little. It is NOT misfiring. I just tuned it up with new plugs and wires. I cleaned the throttle body and ran fuel injector cleaner in it. I have checked for vaccum leaks and can't find any. It runs great on the hwy and anything just above an idle. It actually runs fine at and idle but just does not settle down completly at and idle. Of course you can watch the engine move just a little at an idle also. NO check light and no codes so as you figure it is not very bad but just enough to be anoying. Does anyone have any ideas?
Rob