So at WOT I should be hitting 4000psi???

 

At least 3000+. It will vary by load.

Josh

 

So, could I safely assume that either my HPOP or IPR is dying?

 

I would pull the IPR and check the screen.

Then air test thru the ICP to see if the HPOP or branch tube is the culprit.

Josh

 

I had some time today to dig deeper into this problem. I put the truck back to stock and took it for a test run with the AE hooked up. I now am really puzzled. ICP actual pressure will now hit 3900 psi with IPR at about 85% at WOT. It will now start hot although it still has extended crank time. Could a sticky IPR cause this?

 

The "trouble" with a lot of tuners is they play games with the sensor values to fool the PCM into creating more power. So, without knowing the details of how that specific tuner achieves it's power a number of sensor values likely were effected with the tune.

An easy illustration would be for the tune to reduce the actual BST by 20% so the PCM unknowingly lets the BST go higher than it would normally allow it. So the PCM and dash gauge may show 25 PSI, but there might actually be 30 PSI..

 

All of my custom tunes limit boost to around 24 psi. Stock I can push around 26.

Josh

 

Edge tuners suck, they fool the computer. Get a SCT with custom tunes and never look back. They reprogram the computer and save the stock tune for later.

 

That is exactly what the Edge Evolution does. I've had this tuner for close to 50000 miles with no issues at all. Furthermore replacing my tuner with a SCT is not going to correct the hot start issue I described in the original post.

 

I found the problem. Oil rail to injector o-ring on #7 injector was pooched. There is a pic here comparing it to a new one.

Ford Truck Enthusiasts Forums - ramsay's Album: 6.0 - Picture

 

so that's the Oring in the TOP of the Injector??


Thanks for posting the Outcome Reps to ya if it will let me

Given to much in 24hr period can someone REP Him for Me Please thanx

 

I hooked him up!

 

Yes, where the oil rail connects.

 

You need to look at a post by creator that addresses the cause of the oring failure you just had as it is likely to happen again, https://www.ford-trucks.com/forums/1...ole-story.html And thank you for the update.

 

Thanks for the link. That is exactly how my o-ring looked. I'll keep this in mind in case this happens again. I had attributed the failure to incorrect installation procedure of the oil rail but maybe it wasn't. Reps to ya.