Not familier with this engine but if its not a common rail its probably air ingress to the fuel system. Has the filter been changed lately?

Hi have changed the fuel filter and give it a good dose of injector clean, unfortunatly its not made any improvment any other ideas please.

Hi thanks for the reply the son-in-law who is a experienced volvo tech and myself are going to have a good look at it on tuesday he says that its an unusual fault on a diesal i had a test drive last night as before ticks over fine, banging the pedal down in neutral it revs right up no probs, drive away in first and second fine if you put it in third around 27 mph it misses untill you hit 30-31mph change to forth at 30 -31 it misses like hell untill you hit around 34-35 change into fifth around 40 misses untill you hit 47-50 then drives ok it as if theres a small band of revs that cause the problem we are going to follow you advice and put in some plastic pipeing to check for air, no it does not have a priming bulb

thanks again for your input will let you know the outcome of tuesdays effort

Edited by fastbysuzuki on 03/03/2012 at 13:32