As the title says engine runs rich with cooling fans on, when they switch off it goes super lean. Tried SD with MAF disable and no change. Turned on short terms and it corrects for each scenario. You can add fuel to the VE and MAF table in those areas and there is no change in AFR. Im lost, have never seen this. This is a 5.3 216/220 /550/.550 on 112. 50lb Flex fuel injectors at 40-45 PSI rail pressure. Fast 92mm TB LS2 Intake shorty headers in a XJ cherokee.
I have posted the tune and log. At the end of the log the cooling fans turn on then goes rich. Ideas?