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73ess 73ess is offline
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Join Date: Apr 2000
Location: San Francisco, CA
Posts: 566
Thanks Rahl. My CO was measured today with engine warmed up. CO level at idle was 6.5% to 7.0%. So maybe the backfire was actually from the exhaust?

Originally Posted by 356911930 View Post
From memory it is 1%-3% IIRC. If smog check is not due soon you can tune it by ear, like a carburetor.

Old 04-04-2018, 10:37 PM
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