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