Sounds very much like mine,took my cat of the other day just to see what condition it was in,then ran it with out it on , turbo whistled like it should for about a minute and ran smooth,then went shut up and had what sound like a miss fire,but i think one cylinder is getting to much fuel,a lean mixture on deisel's mean low or no boost, know this from working on diggers and tractor's,i think mine registers a fault and goes to limp mode,going to go right through the timing soon. regards Tim
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