Great compression. It is a turbo out of camper sitting for ever @30,000 original miles. Problem is it wont start and stay running. If I hold the flapper on the afm it will run but badly. Can't find a replacement for that. It ran great for the past year then bogged at lights. Progressing to bad start and horrible warm idle to capoots.I am a bad mechanic. I replaced fuel pump, filter, throttle p.s., water temp sensor. Changed afm with other used and made no change. Don't know where to go from here. I'm almost ready to do a swap for an re

what's wrong with it? blown head? faulty turbo? vacuum lines? won't run period... etc. elaborate please