× 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: P120F Fuel Pressure Regulator Excessive Variation
Posted to HD/Fleet Forum on 2/16/2019

I haven't worked on 6.4 power strokes yet but if it a common rail system like the 6.7 I would suspect a faulty pressure regulating valve. Login to read more.