Hey guys,

Here's my problem. Couldn't get the 6E fueling good so i went back to 32B. The BPW vs load table gives me lots of fueling control. I have been able to get the idle AFR very good and even partial throttle good up untill the engine reaches an opperating temp of about 200-220F. Then it goes way rich and I can't get it to lean out. The computer is in closed loop long before I reach these temps. Is there something in the code that tells it to add more fuel at these hotter temps or is there a table that I'm not familiar with that controls that. Havn't been able to figure that out. Another thing is that i'm running headers and my O2 voltage stays between 800-900 continually wheather the AFR's are a steady 14-15 at idle or a very rich 12 at Idle. My wide band has a simulated AFR output for narrowband. I was wondering if i can hook that to the ECU instead of the narrowband? It's Zeitronics. Thanks again.

 

Yes, do that first and see what the results are.
Make sure your gnds for the sensor(s) are correct.

 

I hooked up the narrowband output and it worked just fine until the car ran for like 5-10 minutes and then the O2 voltage just stayed at 900 whether it was running at 11-14 AFR or a very lean 17-18. It fluctuated correctly at first and then just stayed at the mentioned voltage and then the AFR's began to fluctuate all over the place reacting to whatever changes i made but then quickly reverted to what ever it wanted to. Seems like the computer has a mind of its own. One things for sure I cant get anywhere with the tune. Any suggestions on where to go from here.

Later Henry