I have a dtc p0303. The spark plugs and wires has been changed what next? on 1998 Chevrolet Express 1500

service engine light still remains on

by in Chicago, IL on September 28, 2012
2 answers
ANSWER by on September 28, 2012
check the compression on that cylinder and let me know what u find.
ANSWER by on September 29, 2012
After repair the computer will have to be reset to turn off SEL. If you have done this and still have the same code may have an injector problem. Or as answer 1 said compression low.