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I have the long tube headers, ca'jun B-pipes no cat's and JBA exhaust. It's exhaust leaks between the headers and B-pipes, gaskets blow out after about a year and I get the CEL. replace gaskets and I'm good.
 

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Discussion Starter #44
I don't believe I have any exhaust leaks. (Crawled underneath with engine running and didn't hear any).
And if it was an exhaust leak, why would it clear itself?
 

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Even my Titan will clear itself after so many cycles of key. Even with gaskets leaking. Did you try cleaning mass air sensor? Maybe one of your front sensors could be just lazy, it happens. My left side is original sensor, while my right is a replacement because it went bad. On my brothers Snap-on scanner they both react the same. Just today I had my laptop hooked up checking everything with my UpRev program I have in it for tuning! Both reading 14.5-14.7 on air-fuel ratio from front sensors. My back sensors are turned off! No cats!
 
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