wont pass on a clear and drive in here in NJ. all systems need to show "ready".

whats the code? p0420? thats the cat code. clamped on cat dont sound so good. still could be the rear o2 sensor, if the cat is a hi flow cat the rear o2 is getting pissy about it. this is where the spark plug anti fouler comes into play.

herers a how to on that trick