Recent content by h1875

Yes it has a double cat with pre and post cat o2 sensors. I was inquiring about an alcohol water injection to cool the combustion chamber. high combustion chamber temps. are the main cause of NOX being out of spec. [ low octane,timing to high,bad cat. vacuum leak ect... Which is'nt the case on...

I have a 2.9 no egr system. [stock] I have maintained this truck to a "T" But have always had Nox problems. With the new more strick EPA standards my only route is looking into water injection to cool the combustion chamber. Which brand works to solve this problem well without killing my pocket...