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03 6.0 no start
So I've got an 03 F250 6.0 and this thing has been a nightmare. When I got it the truck had 61000 miles and two burnt pistons. It's basically got a brand new engine in it now. I'll go ahead and list everything replaced so far:
Completely rebuilt engine bored .040 over
Engine Oil Cooler and screen (screen was ripped)
Rebuilt injectors putting out 155cc (a lil higher than stock)
HPOP and all tubing from HPOP to oilrails
Replaced seals behind the nipples in the oil rails
IPR and ICP
Installed coolant filtration system
EGR delete with up pipe
Since doing all of this work the truck runs great. Easily has enough power to light up the 38 tires on it. It'll also run all day no probs... until you turn it off. Then I have to wait an hour or more for the truck to cool down before it will restart. When cold starting, the the pressure coming from the HPOP is right at the desired (if i remember right around 648-650). When warm starting, it drops to 450 and wont turn over. We cant find a leak anywhere and have no idea what is causing this. Again it has a brand new HPOP. Any Ideas?
Also, my batteries aren't the best. I plan to replace them but want this issue resolved before I start dumping more money in it. My thinking is if it was the batteries, it wouldn't start in the first place... but I could be wrong. Oh and I'm running Rotella 15w-40 synthetic oil with the motorcraft oil filter.
Last edited by wmleeiii; 01-02-2014 at 09:11 PM.
Reason: More info