i have a 2005 f450 and i just put a hpop,icp,ipr valve on the truck it was running really good and i went to start it up and it crank up and went to back up and it died but cranked back up started to drive and it died but cranked back up and then it started to cut in and out and then it stoped and did it again but know it died and wont crank back up it only has 500 miles on new parts what could it be the rpm moves when cranking and no cel or codes

 

Sounds like a bad ICP or possibly IPR.

 

i unplugged the icp and still no start could it be a bad hpop