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

A bad-acting 7.3 Powerstroke IPR does not always need to be replaced. Many are simply contaminated with oil debris, varnish, or simply have worn seals. Most replaced IPR failures are really contaminat … 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

The factory 1999–2003 7.3 Powerstroke fuel system is a deadhead setup: fuel enters the heads, feeds the injectors, heats up, and then has no real path out of the fuel galleries. That can leave t … read more