Quote:
Originally Posted by mrg666
Old O2 sensors were hard to take off without damage when I was replacing the header. I agree (and picture shows) that they were probably damaged.
I know OFT tune disables the CEL for O2 sensor after the cat. But it should have given a CEL at least for the pre-cat sensor instead of mixing a bad AFR.
This thread should be sticky to show how a bad mod ends.
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At least as a warning. If your not willing to do your homework don't mod your car. Engines are not cheap and the labor will be worse.
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