on my 1996 diesel RR the injector light is on all the time and is very sluggish am i correct in thinking it no 4 injector thats failed and also if you install a new one do you have to have it set up at all please can anyone help me
Sounds like injector to me if running sluggish ,crank sensor would either not work or run like a pig, the engine management light will come on if no four injector is faulty .