keep failing NOX new spark plugs and oil change and NOX went higher on 2002 Dodge Stratus

also new thermostat

by in Aurora, CO on November 28, 2012
2 answers
ANSWER by on November 29, 2012
do u have eng codes? nox is from high temp in combustion chamber. timing,egr or catt issues
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ANSWER by on April 11, 2013
You need to put the same spark plugs that were from initial build. Champion any other will cause problems.