Question about Chevrolet HHR
Possibly a tune up including spark plugs, fuel filter, pcv valve, air filter, and an oil change. Do include the spark plug wires if it has them.
If all of that is fine, see if the spark plugs are covered in oil... that will also cause it to run bad but not necessarily throw the check engine light.
Posted on Mar 27, 2011
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Posted on Jan 02, 2017
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