× 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: DIESEL PRV VALVE BEHAVIOUR.?
Posted to HD/Fleet Forum on 2/25/2019

I can't speak for anything but the Duaramax. That is all I work on. It uses two FPR's. FPR 1 is located in the HP pump. FPR 2 is located on the bank two fuel rail. At idle the ECM is controlling FPR 2 to control how much fuel pressure it needs. Above 1700 RPM'... Login to read more.