× 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: Ford Baro, Fuel Trim, Pulse Width, MAF,and O2
Posted to Technical Theory Forum on 4/30/2005

[...trimmed text...]

No. As Michael insinuated, the MAF measures air mass rate. That in turn allows the PCM to calculate the BASE FUEL SCHEDULE/CALCULATION. Trims are simply the deviation the PCM is making from that base ... Login to read more.