wont idlel

[jonb1]

hello i got a mate who has a 2ltr fwd transit that wont tick over if you start it & keep it above 2000rpm it runs well but below that it cuts out every time read codes & it came up with p1665 p1666 p0149 p1563 p1564 pp1664 po335 etc he against my advice has fitted a new pump but still has same fault he says hes checked wiring loom for usal damage but cant find anything the other thing it does is the rev counter behaves very eraticly & will even stay at 2000rpm when its cut out i still feel it has a wiring fault somwere but he is not convinced has any one come across this fault before or any suggestions please

[chubba676]

P1665 - Engine control unit malfunction.
P1563 - Injection pump engine stop.
P1664 - Injection pump malfunction.
P0335 - Crankshaft position sensor
P0149 - fuel timing error
here a few codes ive found from other ppls fault diagnosis