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Old 12-03-2021, 10:02 AM   #3
eb02z06
 
Drives: 19 Z06
Join Date: Dec 2018
Location: Elmira
Posts: 13
Quote:
Originally Posted by KingLT1 View Post
Usually a big split in fuel trim at idle indicates a exhaust leak or vacuum leak. If smoke test didn't indicate any leaks around the manifold then you might check the header flanges to make sure they are not warped and sealing properly. This happens occasionally even with Kooks stuff.
We did notice an issue at the 02 bung and we fixed that. I was thinking about the header flange at the head last night. It does make sense and I will check that-completely lost with this and I appreciate your input. I'll check that out.
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