× Auto Repair Pros Member Benefits TechHelp Knowledge Base Forums Resources My iATN Marketplace Chat Pricing About Us Join Industry Sponsors Video Members Only Repair Shops Auto Pro Careers Auto Pro Reviews
Join Now
International Automotive Technicians Network
Re: opposite fuel trims
Posted to Technical Discussion Forum on 12/5/2017

If you let it idle for awhile with the negative STFT and positive LTFT, what do the trims do? I would expect their absolute values to move closer together if everything on the control side is working properly. I would also monitor [graph if you can] what the t... Login to read more.