Notes written for workshops, fleet operators and rebuilders working on diesel fuel injection systems. Diagnostic first, parts second.
How to tell a failing common rail injector from compression, turbo and air-side faults — and why the cheap checks come first.
Read the guide →Three very different things are sold under similar descriptions. Here is what separates them, and what to ask before you buy.
Read the guide →What the digits on your injector actually mean, why several numbers fit the same part, and how to avoid ordering the wrong one.
Read the guide →The pump sets pressure, quantity and timing. Here is how wear shows up, and the checks that separate pump faults from supply faults.
Read the guide →Water, dirt and misfuelling damage common rail components differently. What to check, and why cleaning the system matters as much as replacing parts.
Read the guide →Many common rail systems store per-injector calibration codes. Here is when reprogramming matters, and what goes wrong when it is skipped.
Read the guide →