So I tore into my 2003 6.0 and replace my HPOP and ICP sensor knowing since my IDS said that the pressure was low I knew that the HPOP had gone again so i replaced them started the truck up went on test drive and then shut it off now it cranks but will not start. since this is my 3rd one now here's what i've been looking at on my IDS
IPR % 84.17
ICP 486 psi - batteries we're low when i tested this so i don't think my RPM's were up.
would the IPR cause a no start? or has the rebuilt pump i had warrantied and just put in from the dealer gone bad on me again.
another question since the IPR is 84% that means it's stuck open right? would it cause the ICP to show low PSI?

Please HELP i love my truck and would hate to do a $3 fix on it

 

The IPR % is how much it is closing, so the higher the percent goes the more it is closing. Pull the IPR and check the screen, it is very common after HPOP replacement for the screen to get clogged or even broken, if it is broken then replace the screen but make sre the inside is clear of debri.

 

isn't the the higher the % is the more open it is? when i replaced the HPOP i pulled the IPR to check it out and the screen had crap on it but it wasn't metallic so i pulled it off did a visual inspection and put a new screen on that i had left over from the many gasket kit sets i've purchased since last spring and re installed it, it started fine ran great took it to the car wash and came home shut her down and went out later to go hunting and and bam crank crank till the batteries read 11 volts i was done put a battery charger on it, i pray to god it's the IPR cause i really didn't enjoy changing the HPOP for the 3rd time.

 

I would air test it and be done with it. A few months back we had a faulty injector cause a very similar issue but all 8 were new, air test led us to the faulty injector.

Sent from my DROID RAZR using Tapatalk 2

 

how should i air test the HPO system? i've read many of ways to do it but i can't close the IPR valve with my IDS software well i might be able to i just don't know how to do it with IDS. i have an 03 powerstroke and was said that it would have a little oil comming from the top of the injector i don't know if this is true but i'm up for anything at this point.