Riffraff Diesel Technical Knowledge Center
7.3 Powerstroke HPOP Line Upgrade and JIC Conversion: Why it's a necessary upgrade
Apr 3rd 2026
If a 1999–2003 Ford 7.3 Powerstroke is leaving oil in the valley, one of the first suspects is the high-pressure oil (HPOP) hose and its STC quick-connect fittings. The upgraded Riffraff HPOP JI
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Engine Harness Assemblies: Why OEM Is The Way To Go
Mar 27th 2026
On a 20+ year old 7.3, the harness usually doesn’t “die” all at once. It fails the annoying way: intermittent faults, weird codes, random driveability issues, and electrical gremlins
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Motorcraft IPR Valve for 7.3 Power Stroke (1996–2003): Symptoms, Fixes, and Install Tips
Mar 25th 2026
The 7.3L Power Stroke’s HEUI system runs on high-pressure oil, and the Injection Pressure Regulator (IPR) controlls how much oil the HPOP actually sends to the injectors. When the IPR is happy,
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Full Step By Step How To: 7.3L Billet Manifold Plenums
Mar 19th 2026
Parts Required:
Riffraff Diesel Billet Manifold Plenums 1994-2003, including:
(2) Billet plenums
(2) Viton o-rings
(1) Installation hardware packet
Recommended Parts:
Turbo/pedestal o-ring k
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Why It's Needed: 1999–2016 Super Duty Front Wheel Bearing Grease Tool (ABS Block Off Fitting) Dana 50/60
Mar 16th 2026
Ford’s Dana 50/60 front wheel bearings (1999–2016 Super Duty 4x4) aren’t designed to be regularly serviced or greased—which is a big part of why unit bearings can feel like a &
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