I tried tuning my l83 truck today with speed density and failed horribly at it and gave up. Here is the issue I was having. Anytime I let off the throttle the wb would read super lean and no longer register a air/fuel reading and it would skew all my numbers to lean in the 75-100% lean!
I thought by disabling DFCO that it was supposed to eliminate super lean readings when letting off the throttle?
It doesn't appear that DFCO was disabled though because it would go super lean after letting off the throttle and stop registering a reading on the WB and once i gave it gas the reading would come back to around .950-.980 lambda. Is this another gen V issue where you can't disable DFCO in the tune just like STFT's you can't either?
I heard there is a way to make a parameter where I can ignore any data when I let off the throttle? Can anyone explain it to me?