7.3 runs fine then wont restart.

ACFarmer · May 15, 2012

I haven't had a chance to look at it for him yet, but my buddy just bought an obs a month ago. The truck will start and RuN fine and dfine but after it warms up and you shut it off, it winter restart or if you do get it ti restart it runs very poorly. As soon as it cools off its right back to running fine again. Any ideas for me to tell him? Also the other day he shut it off, and when he went to restart it, it actually blew the intake apart? He swears he didn't have ether or anything in it. What do you think? He knows nothing about engines adjust wants to get it running right.

neverkickn · May 15, 2012

Blew the intake apart??? Don't know how that could happen but it sounds like your buddy is having some hpo and or injector issues. I would start with injector buzz and contribution tests and if all looks good there follow the procedures in the link below.

http://powerstrokearmy.com/forums/showthread.php?t=1818&highlight=high+pressure+manual

ACFarmer · May 15, 2012

Yup. Like there's chunks missing out of the plastic now.

JCart · May 20, 2012

Cold start run then no start when at operational temp is a classic symptom of IPR o-rings needing replacing. Get them from international as they are less expensive then ford ( least here in Canada).

jrc

Tom S · May 20, 2012

JCart said:
Cold start run then no start when at operational temp is a classic symptom of IPR o-rings needing replacing. Get them from international as they are less expensive then ford ( least here in Canada).

jrc

That or another place bleeding off HP oil. I have seem the HPOP also be the cause of that.