bowtieman81

iTrader: (35)

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?

JimMueller

iTrader: (9)

How long did you let the car sit between runs? Do you still have AIR enabled? Perhaps the AIR pump was turned on to heat up the O2's?

bowtieman81

iTrader: (35)

My AIR system is disabled, I don't have it on the car anymore. I am going to try undoing the fan changes and see if somehow that works.