Can someone please chime in on my prior post? Here is some additional information on what I have found, I unfortunately spent about 30 hours on this issue and have gotten nowhere, I would greatly appreciate some help. I do have short tube headers on this.
-Commanded open loop, all tuning done below sitting in the garage not on the road.
-Did some cold starts and tuned the choke with the WB
-Tuned BLM's several times open loop
-Engine still gets drastically lean around 1800 to 2000 rpm, if I wing the throttle and get it above 2000 the AFR is about 13.5
-I put it back in closed loop, and the 02 sensor totally messes things up, engine goes lean ~17:1 and O2 sensor swings are wild. If I wing the throttle it comes back but I assume that is only accelerator pump fuel.
I am suspecting the closed loop issue has to do with O2 sensor gains, thresh vs. airflow or one of the other O2 tables but I don't know if I am correct or which one I should start with.
thanks in advance,
Mark
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