Put fuel in from Morison now my truck is running crap goes in limp mod runs on 3 cylinder’s loads of smoke and cut out rev counter goin up and down put a new primer pump on today but has not helped checked the earth leads and all are fine year is 03 k74 had the old bus for 10 years and 1st had any trouble with the engine can any 1 help please
Cheers Jimmy

As you may have guessed, you may have picked up water/shit in the fuel.. Id change the fuel filter (don't use any other than OEM) first. Failing that,as a test,can you rig it up so it runs from a tank outside the truck to run on clean fresh fuel. The metal flow return pipes attached to the fuel tank are well known to rust....Nik

Try not to use supermarket fuels. I always put the more expensive fuel from shell in mine after having problems with tesco fuel. The rule should be that if your engine is 2.0l or over, pay the extra and put in better quality fuel or you will run into problems.