Most diesel owners know the risk dropping winter temperatures imposes on diesel fuel.  As diesel gets cold, naturally occurring paraffin wax begins coming out of solution. Those wax crystals can … read more

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 … read more

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 … read more

The factory 1999–2003 7.3 Powerstroke HPOP lines use quick-connect fittings at the cylinder heads and high-pressure oil pump. They worked, but after more than 20 years of heat, vibration, oil ex … read more

For a 7.3L Power Stroke IPR valve, the two solid choices are FoMoCo/Motorcraft and Alliant Power. The cheap “OEM-quality” valves are where the trouble usually starts. So what’s the d … read more