HELP, I have high NOX and cant pass CA smog
09-29-12, 06:24 PM
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HELP, I have high NOX and cant pass CA smog
I have a 92 SC400 with149,000 miles, I bought the car as is and changed the plugs (gaped at 042) new air filter,new caps,new rotors and wires , it runs really good. NOX was still to high,
I then cleaned the EGR valve and ran seafoam through the PCV hose and it cleaned alot of crap out of it, I also got a bottle of Guaranteed to pass and ran a tank of that and my readings for NOX is higher. Where do I go now, O2 sensors, cats?
I then cleaned the EGR valve and ran seafoam through the PCV hose and it cleaned alot of crap out of it, I also got a bottle of Guaranteed to pass and ran a tank of that and my readings for NOX is higher. Where do I go now, O2 sensors, cats?
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