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International Automotive Technicians Network
Isuzu NPR Fuel Pressure Issue
Posted to HD/Fleet Forum on 4/20/2018 5 Replies

I have a 2016 NPR-HD coming up with codes P0088 Fuel Rail Pressure (FRP) Too High P0093 Fuel System Large Leak Detected

Replaced fuel filters Bypassed fuel filter on rail Ran vehicle without filter on engine

Getting 8000 psi when desired is 5000 psi

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car Vehicle Data

2016 Isuzu NPR-HD 5.2L

VIN JALC4W16XG
Engine5.2 L

car Vehicle Data

2016 Isuzu NPR-HD 5.2L

VIN JALC4W16XG
Engine5.2 L