2002 Dodge Stratus Q&A

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

also new thermostat -
Answer 1
do u have eng codes? nox is from high temp in combustion chamber. timing,egr or catt issues -
Answer 2
You need to put the same spark plugs that were from initial build. Champion any other will cause problems. -