Hello everyone. Haven't been here in a long while though grateful for all the help received in the past. 87 gt is having erratic RPM's when warming up driving between 20 to 50 mph. Goes away when fully warmed up. Any idea's? Put half a can of seafoam hoping to clean it up. Still happening. No codes found and no check engine light. Idles good but tach goes bananas at times when cruising.
theogre
JUN 12, 12:46 AM
O2 and Cat Hates most "engine cleaners" like seafoam.
Otherwise can be many things causing your problem. Might help getting ECM scan tool or not depending just what is wrong.
------------------ Dr. Ian Malcolm: Yeah, but your scientists were so preoccupied with whether or not they could, they didn't stop to think if they should. (Jurassic Park)
