Riffraff Diesel Technical Knowledge Center
7.3L Powerstroke IDM Failure: Symptoms, Codes, and Diagnosis
Sep 17th 2026
A 7.3L Powerstroke can have great fuel pressure, good ICP, a perfectly good cam sensor, and pretty much everything else in good working order, and still not start. When this happens, it’s time t
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1994.5-1997 7.3L Powerstroke OBS Fuel Bowl Leaks: Diagnosis and Repair
Sep 17th 2026
Diesel in the valley of an OBS 7.3L doesn't automatically mean the fuel bowl is leaking. Unlike the later Super Duty, the OBS uses a two-stage mechanical fuel pump in the engine valley, along with sev
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7.3L Powerstroke ICP Sensor: How It Works, Failure Symptoms, Codes, and Diagnosis
Posted by Adam Blattenberg on Aug 26th 2026
The ICP sensor is one of the more important sensors on a 7.3L Powerstroke, and also one of the easier ones to diagnose.
ICP stands for Injection Control Pressure. The sensor is threaded into the high-
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7.3L Powerstroke E-Series vs. F-Series: What’s Actually Different?
Aug 21st 2026
At a glance, a 7.3L Powerstroke in an Econoline looks like the same engine found in an F-250 or F-350. For the most part, it is. The problem starts with everything Ford had to change to stuff that eng
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7.3L Powerstroke VSS Rear Axle Speed Sensor: Problems, Related Codes, Diag And Replacement
Aug 18th 2026
A bad rear axle speed sensor can cause a lot more than a dead speedometer on a 1994–2003 7.3L Powerstroke. The rear VSS signal is used for vehicle speed, ABS operation, and automatic-transmissio
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