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I have a 2003 F250 151,000 mi. with the 6.0. I was having hot start problems so I changed the HPOP, ICP and IPR. Truck ran great till a few weeks later it wouldnt go over 50mph, then 45mph, then 20mph, now 5mph.I have changed all my filters, The stainless high pressure fuel lines on the block (Just in case they were blocked), dropped my fuel tank and cleaned it (little dirty but not bad), Had my FICM tested and it came back fine. It wont rev over 1500 RPM and when I do rev it up there is some (not much) black smoke that come from one of the exhaust pipe behind the motor. Turbo sounds great. No white or blue smoke. Took the EGR valve out (it was a little dirty but was not stuck so I just cleaned it and put it back in). Changed the batteries. Not throwing any codes. Still having the same problem. Also it idles great but will not start again if you let it run for 5 min. Someone PLEASE give me some tips. Thank you in advance!!
What about your injectors ? I just did same as you new HPOP , IPR , ICP , and 5 injectors . My pump was on it the way out and the injectors were leaking where the oil rail pops on causing the hot no start . I would also check all connections and plugs you never know .
I have not done anything with my injectors yet. The black smoke is coming from somewhere between the firewall and back of the motor. I can't pinpoint the side it's coming from I think it may be both because on both sides of the motor the firewall has the black suit building up on it. Icp and pig tail are new. No codes. If there were problems with my injectors would I be blowing white smoke??? I really appreciate the help guys.