Quote:
Originally Posted by stevey_frac
CRS syndrome?
I'm was thinking the leak was dropping exhuast pressure, and this was causing EGR action to slow down, and throw things off. Didn't think about a post cat O2 sensor. Perhaps I should just stick to code? :P
Either way, try 'er and see!
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CRS = Can't Remember S**t
Happens to all of us eventually.
Yeah you're right - any leak in the exhaust certainly has the potential to mess up fuel management. I didn't think about EGR foul-up but that's a possibility. The main O2 is in (just before??) the cat and the 2nd one is just after it, or at the back end of the cat. I'm pretty sure the job of 2nd O2 is to verify the final exhaust is clean enough.