AFR is 17:1 in closed loop!! Why??
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From: Maryland/Illinois
AFR is 17:1 in closed loop!! Why?? I though I saw a thread about this but I cannot find it now. Anyway, at the track last night I ran the car twice, running good AFR at idle is 14.5:1 or so, WOT was a touch rich at 12.4:1, which is what I wanted at the time.
I notice the car is heating up a bit and decided to turn the fans on lower temp. So I did that, reprogrammed and then the AFR in closed loop is 16 and even 17:1 !!??
I could not figure out what the hell was going on. The O2 sensors were switching OK, a little slower than normal but still OK. All I changed was the fan turn on temps, nothing else. Any ideas?
I notice the car is heating up a bit and decided to turn the fans on lower temp. So I did that, reprogrammed and then the AFR in closed loop is 16 and even 17:1 !!??
I could not figure out what the hell was going on. The O2 sensors were switching OK, a little slower than normal but still OK. All I changed was the fan turn on temps, nothing else. Any ideas?
