Need help...No Start...

[diyallthetime]

Hey guys, please shoot me your advice. Here's what's going on....

I had my truck started and running one day, and it died. Just quit like someone turned off the key. Hasn't started since (several months).

Changed cam sensor
Checked battery voltage during cranking
No smoke coming out of exhaust on crank
Replaced IDM with good used
Replaced PCM with good used
Checked relays
Replaced all o-rings in hpop

This truck is a 99.5 and has 32k original miles on it. Has been well maintained, and never sat without being run. I think i'm about down to a bad hpop, but I don't see how this could be the case with such low mileage and such a quick failure. I have not been able to put the truck on anything other than cheap handheld diagnostics. Doesn't pull any codes from that. Haven't had it on AE or ford diagnostics. Is there anything else that would be preventing fuel other than the hpop? I'm pretty certain it's not the injectors themselves. Please help guys, what am I missing? I refuse to go to ford!!

[diyallthetime]

Oh, I also replaced the fuel pump even though it seemed to be running fine.

[CSIPSD]

LOL... You do understand with all the money you have blown on parts you could have bought Auto Enginuity and by now would know what is wrong with your truck...

Now you have changes ALL these things, and if anything made the problem worse.

More then likely you have an IPR issue, crap in it or something to that effect.

Find someone with AE or buy it yourself, Watch ICP and duty cycle while cranking. If your not getting 350psi, then the injectors are not firing.

[diyallthetime]

Yea, I do realize. If it is a bad IPR, would I be able to just unplug it to see if it would work, or would it not change if unplugged and bad?

[CSIPSD]

Unplugging the IPR will do nothing. It will continue to not work. Truck will not start at all without the IPR working.

Need to find someone who can look at ICP and Duty cycles while cranking!

[85_305]

^Listen to this man! He's an absolute monster with these things.

[diyallthetime]

Ok, I pulled the IPR off again, and serviced it this time instead of just changing the o-rings. Cleaned it very well, added a very light lubricant, put back together and installed. Truck cranked a bit, then started to act like it was going to start. One more good long crank and....started! Ran for about 5 min, then when I pushed the accelerator, it quit. I let it cool down, tapped lightly on the IPR with a screwdriver/hammer.....and fired back up. This time it ran just fine and didn't quit. I think the IPR must have been the problem all along. It's running now, but I don't trust that IPR, so it's getting replaced today.

[85_305]

Good job! Glad you found the issue! I told you Joe wouldn't steer you wrong.