Riffraff Diesel Technical Knowledge Center
OBS 7.3 Powerstroke EOT Sensor Swap: Updating the Obsolete 1994–1997 Oil Temp Sensor
Posted by Adam Blattenberg on Jul 8th 2026
Some 1994.5–1997 OBS 7.3 Powerstroke trucks used an early-style EOT sensor that is now obsolete. If your truck still has that old Engine Oil Temperature sensor and it fails, the correct repair i
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PHP Hydra Chip for 7.3 Powerstroke: What It Does, How to Install It, and When Custom Tunes Matter
Posted by Adam Blattenberg on Jun 26th 2026
The PHP Hydra Chip is one of the most popular tuning upgrades for the 1994.5–2003 Ford 7.3L Powerstroke because it fixes one of the biggest complaints these trucks have from the factory: lazy dr
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7.3 Powerstroke Injector Cup Tool Set (94–03) : The Easy Button For Cup Replacement
Jun 3rd 2026
Injector cups are one of those 7.3 jobs where the tool matters as much as the parts. You’re working right over an open cylinder, and the old-school methods (big taps + slide hammers, or hammerin
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OBS 7.3 Powerstroke TP38 Turbocharger Rebuild: Step By Step How To
May 29th 2026
Parts Required:
TP38 360 Bearing Rebuild Kit 94-97: Part# TP-360-OBS
Recommended Parts/Tools:
Riffraff Diesel Billet Compressor Wheel 94-03: Part# RDP170293
Garrett TP38 Compressor Housing
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Hutch and Harpoon Mod (Banjo and Hutch) How To - 7.3L Powerstroke
May 13th 2026
The Banjo and Hutch (aka Hutch and Harpoon) mod were one of the first "budget" mods for the 7.3L Powerstroke. The Harpoon mod when done, allows for more complete fuel fill up's by removing a portion o
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