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How To: 7.3L Powerstroke HPOP Operation Testing(Post)
Oil pressure is everything for a 7.3L. One of the most common questions we get asked is related to how to test the High Pressure Oil Pump (HPOP) on a 7.3L Powerstroke. We say related to, because the h
OBS 7.3 to Super Duty UVCH Mod: Better connections, better operation(Post)If your OBS 7.3 (’94.5–’97) has random misses, contribution codes, rough cold starts, or the classic “it runs better when I wiggle the valve cover plug”… you’re not imagining it. The under-valve-cover
Consistent Oil Supply: Why the HPX makes a big difference in 7.3 operation and longevity(Post)The 7.3L Powerstroke engine uses a HEUI (Hydraulically Actuated Electronically Controlled Unit Injector) fuel injection system. This means that the fuel injectors are actually fired by highly pressuri
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OBS 7.3 Powerstroke EOT Sensor Swap: Updating the Obsolete 1994–1997 Oil Temp Sensor(Post)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 is to u
About(Page)Riffraff is a term for the common people, or hoi polloi. The term is derived from Old French “rif et raf” meaning "one and all, every bit."
Why Replacing the Driver-Side Plastic CAC Tube Is a Crucial Reliability Upgrade for the 6.0L Powerstroke(Post)When building or modifying a 6.0L Powerstroke diesel (2004.5–2006 Ford Super Duty), reliability upgrades often focus on major systems like head gaskets, the oil cooler, and EGR components. However, on
9007 to 9008/H13 Headlight Conversion Pigtail: Plug And Play Super Duty Lighting Upgrade(Post)Looking to upgrade the headlights in your 1999-2004 Super Duty? The headlights found on 2005-2007 Super Duty's are a great option. Not only do they look better than their predecessor (1999-2004), they
Top 10 6.0 Powerstroke Scan Tool Readings Every Owner Should Know(Post)The 6.0L Powerstroke is not the engine you diagnose with hopes, guesses, and a Facebook comment that starts with “my buddy’s did that.” A good scan tool is mandatory. Not just for codes, but for live
Removing your Exhaust Back Pressure Valve (EBPV)? You'll need these code eliminators. (Post)The Exhaust Backpressure Valve on the 7.3L Powerstroke is a common leak point. So common that most of us just simply remove it altogether. Why it's there in the first place: The EBPV was originally i
Every Recall Issued For the 1994-2003 Ford Equipped with the 7.3L Powerstroke(Post)There’s dozens of recalls associated with our trucks. Some of these we’re all aware of, some are news to us, and some (the mass majority) truck owners were never even told about. It’s an interesting l
WARN Premium Hub Set (38826): manual 4x4 hubs that actually stay locked(Post)If you’re done trusting (and fighting) the aging factory 4x4 hubs (or anything with plastic where it shouldn’t be), the WARN Premium Hub Set (38826) is the industry-standard fix: all-metal constructio
The 7.3's Achilles Heel: The Cam Position Sensor (CPS)(Post)The Cam Position Sensor (CPS) on all 7.3L Powerstrokes can be its Achilles heel. This sensor tells the PCM where exactly the rotating mass is in its journey. Without it, or with one that isn’t working
7.3L Powerstroke - Exhaust Back Pressure Sensor Diagnosis(Post)The 7.3L Powerstroke doesn’t have too many sensors compared to more modern era diesel’s, but the ones it does have all play important roles. This week, we’ll be diving into the Exhaust Back Pressure S
The Right Hubs: 1999–2004 F-250/F-350 4WD Wheel Bearing & Hub Assembly (Coarse Thread)(Post)If you’re hunting a replacement front wheel bearing/hub assembly for a 1999–2004 Ford F-250/F-350 4WD, the first thing that matters is stud thread pitch. This Axiom unit is specifically for coarse thr
5R110 TorqShift, Common Problems: Symptoms, Causes, and Diagnostic Tips(Post)The 5R110 TorqShift used behind the 6.0L and 6.4L Power Stroke is a strong transmission, but just like anything else, it's not bullet proof and will need repair from time to time. Fluid, electrical, h
7.3 Injector Cup Replacement Made Easy: Riffraff Diesel 7.3L Injector Cup/Sleeve Tool(Post)Our Patented Injector Cup/Sleeve Tool Set for the Ford 7.3L Powerstroke Diesel is the result of 12 years of refinement by 7.3L enthusiasts. 12 years of testing and tweaking until it was absolutely per
Ford Recall List: 6.0L Powerstroke(Post)Just like our 7.3 recall list, on this 6.0L recall list, we’ll concentrate on drivetrain related recalls and include links to documents where we can find them. Some recalls listed on the NHTSA site ha
6.0L Powerstroke Lifter and Camshaft Damage: Symptoms, Diagnosis, and Repair(Post)Lifter failure is one of the 6.0L Powerstroke problems we'd rather catch early, before it completely destroys the engine. The 6.0 uses hydraulic roller lifters between the camshaft and pushrods. Norma
How to Test a 6.0L Powerstroke Electronic Fan Clutch(Post)A weak fan clutch can make a healthy 6.0L Powerstroke look like it has a major cooling-system problem. The truck may stay cool unloaded, then heat up while towing, climbing a grade, idling, or running






