Hi Recently had a problem on a Renault diesel common rail which was loosing pressure resulting in a hard start. Unfortunately no fault showed up on the car or when I plugged the Autel MD802 all systems in. I then done a leak test on the injectors and 2 of the injectors had been leaking back into the return pipe this was my problem and it was fixed. Would there of been any way of  finding this out using the MD802 does anyone know please? Also since then a couple of  times there has been a hard start not just as bad again no fault showing on the car and no fault found on the MD802 Elite all systems but I suspect it is a fuel regulator on the pressure rail. Can anyone advise please?

Tags: MD802 , fault , finding