I have a full bolt on 2003 Evo 8. The car has been flashed by Turbo Trix Racing in NJ. I have had a problem with the CEL before the car was even tuned. After reading on the forums i tried the spark plug anti fouler trick. It worked flawlessly for several weeks, but later through a cel for the rear o2 sensor. After hooking it up to an ob2 scanning tool it showed that i had a random misfire code as well as the rear o2 sensor. Could that random misfire, because of fouled spark plugs, be the reason for the o2 sensor code coming back?


If you haven't figured it out yet the car is for off road use only and is not using a cat:

Thanks in advance for your replies.

 

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