The ScanTool Package Consists of: AutoEnginuitySoftware AutoEnginuityOBD‐II Interface (ST06) USB 2.0 Interface and Cable User Guide •Quick Installation Guide Enhanced Activation Instructions (B ...

If you tow with a 1999–2003 7.3L Super Duty, you already know the weak link isn’t usually the engine—it’s usually 4R100 transmission heat issues. That’s where the Gradie ...

We started this blog as a way to help our fellow Powerstroke owners keep their trucks on the road and running great. We’ve shared tons of tips and tricks to help you do just that, but often we ...

If you’ve got oil pooling in the 7.3 engine valley (under the fuel bowl/HPOP area), the HPOP is always on the suspect list—especially the rear/end plug and the high-pressure discharge fit ...

Good clean oil is extremely important to a 7.3L. Moreso than for most other engines. That's because the oil is used differently than with most other engines. The 7.3L injection system is more like a ...

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&rsqu ...

 If you’ve ever looked at the factory fuel banjo bolts on a 6.0L and thought “I should just drill these out,” you’re not alone—and it’s also how people end up ...

Full PDF Instructions can be downloaded here: https://www.riffraffdiesel.com/content/RESOURCES/Riffraff_PDF_Plenum_Inserts_Instructions.pdf Product Links: 1994- Early 1999: https://www.riffraffdiesel ...

Often missunderstood and done incorrectly, 7.3L HPOP line replacement is a simple job just about anyone can pull off in an hour or two. So let's get rid of the fear of the unknown that stops most of ...

The blue spring upgrade exists because the 6.0L Powerstroke has a fuel pressure problem that usually starts small, stays hidden, and eventually gets expensive. From the factory, the regulator in the ...

If you’ve owned a 1999–2003 7.3 Powerstroke long enough to do a few fuel filters, you’ve probably met the factory fuel bowl cap in its natural habitat: tired, stripped out, and one ...

The 7.3L and 6.0L Power Stroke engines are somewhat unique in that they use oil pressure to run their fuel injection systems. The system was created with a joint venture between Caterpillar and Inter ...

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 gremlin ...

Let’s talk about Powdered Metal Rods, or PMR’s as they’re more commonly called. If there’s one thing that causes the most damage to the 7.3L Powerstroke in one shot, the PMR i ...

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, ...

When upgrading a 7.3L Powerstroke (1994–2003) for more power, one of the first hurdles is the PCM’s built-in overboost limit, which is typically around 23–24 PSI. Exceed that, and t ...

Oil leaks on the 7.3 are common. One of the most common areas to leak, is from the turbo pedestal. It’s also one of the most commonly misdiagnosed leaks as the oil generally leaks down the back ...

Full PDF Instructions can be downloaded here: https://www.riffraffdiesel.com/content/RESOURCES/Riffraff%20Diesel%20High%20Flow%20Banjo%20Bolt%20Instructions.pdf Product Link: https://www.ri ...

Full PDF Instructions can be downloaded here: https://www.riffraffdiesel.com/content/RESOURCES/Riffraff%20Diesel%20HPOP%20JIC%20Hoses%2099-03.pdf Product Links:  HPOP JIC Line - Passenger Side ...

In the early days of light-duty diesel pickups, intercooling wasn’t a thing yet. GM’s 6.5L, the 7.3L found in OBS trucks, and even early 5.9L Cummins were all turbocharged, but none came ...