A rough idle and even an emissions inspection failure for high HC and CO can be caused by improperly adjusted valves. Also, exhaust valves may become to tight which can lead to valve failures. Our technicians tell us that regular valve adjustment inspections are a must.
Improperly Adjusted Valves May Cause Emissions Failure/Rough Idle on Toyota Corolla
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Replaced fuel pump because engine would quit & trouble shooting revealed not fuel pressure. Now...
Recently replaced valve cover gaskets and plugs because of oil leak around the plugs. Now, as soon as engine heats up, rough idle begins. Idle is fine when engine is first started. Except for rou...
please, help the diagnostic test shows 4 misfires and an idle control problem. is it possible...
What do I need to do to improve the idling ? It doesn't idle as smooth as it should.
ive adjusted throttle cable as low as it will go still high idle and revs up and down