Your Engine.
Decoded.
Deep-dive diagnostic and repair guides for every major diesel platform. Written by the mechanics who do the work — covering symptoms, root causes, repair scope, and the decisions that shape each fix.
Browse by Engine
Power Stroke
6.0L · 6.4L · 6.7L · 7.3L
Ford Super Duty diesel platforms. Head gaskets, EGR coolers, CP4 pumps, turbo faults, and the emissions-system behavior that drives most Power Stroke shop visits.
Duramax
LB7 · LLY · LBZ · LMM · LML · L5P
GM 6.6L Duramax across six generations. Fuel pressure faults, water-pump failures, injector codes, and the cooling-system quirks that separate one Duramax year from another.
Cummins
5.9L · 6.7L
Ram Cummins inline-sixes. Transmission behavior (48RFE, 47RFE, 68RFE), heater-core leaks, TIPM electrical issues, and the fuel-system decisions that shape long-term ownership.
Latest Research
The CCV Filter Upgrade: What It Is and Why We Bundle It With DCR Conversions
The 6.7L Powerstroke's crankcase ventilation system manages blow-by before it causes oil leaks, turbo contamination, and performance loss. Here is what the CCV filter…
7.3L Power Stroke — Common Issues (CPS, UVCH, IDM, and the Legendary Engine’s Weak Points)
The 7.3L Power Stroke has a well-earned reputation as one of the most reliable diesel engines ever put in a half-ton-plus pickup. But even…
6.0L Power Stroke — Turbo Vane Cleaning (Stuck VGT and Boost Codes)
Stuck variable geometry vanes on the 6.0L Power Stroke turbo produce boost codes, power loss, and hesitation — but the fix is often a…
6.0L Power Stroke — Glow Plugs (Failure, Testing, and Replacement)
Glow plug issues on the 6.0L Power Stroke show up as cold-start problems and P067X codes for individual cylinders. The system is similar to…
6.0L Power Stroke — FICM Diagnosis (Testing and When to Upgrade)
The FICM (Fuel Injection Control Module) on the 6.0L Power Stroke is one of the most-often-replaced components on the platform — but only half…
6.0L Power Stroke — Injector Failure (Stuck, Leaking, and Stiction Issues)
Injector failure on the 6.0L Power Stroke is one of the more involved repairs on this platform — but also one of the most…
Still Not Sure?
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