LTFT air/fuel question
10-07-2005, 07:42 PM
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LTFT air/fuel question I am using HPTuners and after some tuning, I have been able to get all of my LTFT's 0 and below, the lowest being -7. My question is can I safely assume that my air/fuel ratio is safe for WOT runs judging by the LTFT's and my lack of a wideband?
10-07-2005, 08:26 PM
#2
No you cannot assume that. The WOT is independent of the VE table. You will have adjust the PE Enrich Table to dial in the AFR at WOT. The stock O2 sensors should be in the range of 880mV-920mV (12.8-13.2). Although, this is not best method but, it can get you close. The wideband is the preferred method. I was 930mV and my wideband was at 12.0 AFR. I was tuning my car based on LTFT's and did not really work. Once I got the wideband, I put the car into SD mode and my VE table is all whacked. Currently in the process of building the new VE table based on the wideband. I would get the LC-1 and can be had for $199 and it will be your new best friend in tuning.