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Topic Review (Newest First)
07-04-2013 03:30 PM
YJ1990rav Alright cool, i will check that out. Thanks
07-04-2013 03:27 PM
jokerchief462 Yes an exhaust leak with a bad reading by an O2 sensor will cause problems.

This is an excellent website with great info and will help you out.

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07-04-2013 03:01 PM
Fail smog/exhaust leaks?

I have a 1990 yj 2.5L and i failed my smog, excessive NO almost triple the max amount. I found 2 exhaust leaks. One under the manifold right below the o2 sensor and another just before the cat where i welded the bracket for the pipe. Can this cause me to fail smog solely or is it my cat also?

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