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classic example is the early 2000's up to about 2004-5 petrol Pajero.
The fuel pump is an extremely clever doodad that has some chips and stuff in it. It basically has a small ecu in it that reads...

now that I am in the older car owner category the one thing I have learnt is that all the older diesels (pajeros, surfs, nissans and isuzus) all start to give you dramas when they get up to...