× 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: LEAN P0171 & P0174
Posted to HD/Fleet Forum on 5/31/2018

Donald I have 55psi fuel pressure I posted fuel trims earlier post as soon as the codes are cleared they come right back! But no ck engine light. I don't see any exhaust leaks at all, this engine uses a vacuum air pump as well. Still unsure where to turn now. Login to read more.