stackermartin

hello there, am a frustrated p38 owner thats cost me more money than the wife. hav fitted recon gearbox,new cyl head,radiator,alternator,injection pump and various other mega priced items.truck was running sweet when i suddenly lost all accelleration,limped it to a safe place to put my head in the usual place ie under chuffin bonnet, no joy,called knites in shining yellow vans (AA) he plugged in and came up with throttle abnormality ??, got me home and i changed throttle pot but still got no revs,saying that it goes up slowly to about 1200 revs,hav tried all mechanical issues and fuel issues,i think its a pump fault myself but just asking if anybody got any ideas before strip inj pump out and go and ram it down the throat of the guy that overhauled it for me. thanks for listening