P0300 = random misfire.
Random cylinder misfire
The 1989 Chevy Cavalier could be either a 2.0L 4-cylinder or a 2.8L V-6.
Check the air filter.
CLEAN THE INJECTORS. OR HAVE THE INJECTORS CLEANED BY A GM TECH.
What's wrong with my 2003 Chevy Cavalier if the check engine lights on and a friends computer said "misfire cylinder 4 "? It studders also. thanks Dawn
The firing order for a 1989 Chevrolet Cavalier is 1, 3, 4, 2. This is for a 2.2 Liter engine.
I had that happen n I changed my plugs n coil pack...easy to do
Are you asking about an engine misfire? If so you can use an inductive timing light to determine which cylinder is not getting any spark. Misfire could be caused by: Bad spark plug. Bad spark plug wire. Bad coil. If it is the coil then two cylinders would misfire.