Had the squealing pump a couple of weeks back,,,,was quotred 438.00 for new pump from Forest Glenn... a mate came round to give us a clew or two and we fitted his pump ,squealed same as mine... I had read about air getting back via the injectors....was very hard to start....The battery is only a few months old and whilst it drives the starter crazy seedmes that no power was getting to the heaters , as when we put it on charge engine started just fine???
Replaced injector seals and copper washers ....pump still squealed ...removed fuel filter ...only 2 months old and poured fuel into glass jar there was much black stuff in fuel Carbon I Guess...replaced filter and hey presto no sqealling ...engine fires up just fine runs very well

