When a Mitsubishi 4M42 engine starts losing rail pressure stability, rough idling, or hard starting, the issue often traces back to the injector control valve assembly (F00RJ02246) inside the Bosch 0445120073 common rail injector.
This tiny hydraulic component is responsible for regulating fuel pressure inside the injector with extreme precision. Even slight wear or internal leakage can disrupt injection timing, leading to poor combustion performance, increased fuel consumption, and engine instability.
Common symptoms include:
Hard cold starts
Engine misfire or uneven idle
Loss of power under load
Fuel return abnormalities
Because it operates under high-pressure conditions, valve wear is one of the most common failure points in long-service diesel injectors.
Proper diagnosis and replacement of the F00RJ02246 valve assembly can restore injector performance and extend engine life—especially in commercial Mitsubishi Canter applications.
👉 Read More: F00RJ02246 Injector Valve Assembly: Compatible with 0445120073 Injector & Mitsubishi 4M42 Diesel Engines



















