Thread: 2014 diesel Hilux slow starting & loosing fuel prime.

A lot of the pesky fuel system issues just throw a generic code or none at all. Unfortunately for the modern mechanics that swap the parts the computer tells them to, the diesel fuel system still requires the odd bit of diagnostic work. What might work if you are still having faults is fit a clear hose between the injection pump and the filter which a high point at each end and a low point in the middle and leave it overnight. You'll see air bubbles if the leak is in that area and whichever end will hopefully tell you where from. A piece of clear hose between the tank supply and the filter with a high point in it will do the same.