I cant get my truck to start when hot, its reading about 360-390 rather than the 500psi required to fire. I JUST replaced lpop and still have this problem. Ive done stc dummy plugs and stand pipes. Ive also done the turbo oil line upgrades. An air test didnt tell me anything either. Am i missing anything?

 

What is your IPR reading while cranking? IF it's under 500, my guess would be IPR Valve stuck. Very common but usually happens when cold, hot, not sure on that one but I do know that you need that 500 psi to start the motor & usually they get clogged which prevents the IPR valve from closing and reaching 500 psi upon start up. Don't buy a new IPR Valve, you can get an O ring and screen kit and unclog it for about 30 bucks, plenty of info on how to do this here

 

360-390 as stated already and the scanner shows the ipr at 85%. 85% is the max you can get out of them beyond putting 12v to the ipr by using the battery and a spare ipr pigtail. Ive done that as well for the air test and could not find a leak. My next step is to air test through the ipr port rather than the icp. If i still dont find a leak then it must be the ipr.