Riffraff Diesel Technical Knowledge Center

Diagnosing HPOP Issues on the 7.3L & 6.0L Powerstroke's

Diagnosing HPOP Issues on the 7.3L & 6.0L Powerstroke's

Aug 30th 2025

The High-Pressure Oil Pump (HPOP) is the heart of the HEUI (Hydraulically Actuated, Electronically Controlled Unit Injector) fuel injection system used on both the 7.3L and 6.0L Powerstroke. When the … read more
Common Hard Start Issues: 7.3 Powerstroke

Common Hard Start Issues: 7.3 Powerstroke

Posted by Adam Blattenberg on Jul 23rd 2025

The 7.3L Powerstroke is one of the most reliable diesel engines ever built, but as these engines get older, many issues become more and more common. Hard starts being near the top of that list. But th … read more