06 6.0 low icp when warm

[HuSlungDu]

I have a 2006 6.0 that won't start when warmed up. Let it cool off and it starts fine. I can drive as far as I want while its running, but after it's warmed up and I shut it off, it will not re start. ICP reads around 200 while cranking. When pressurizing with shop air, I hear air leaks coming from passenger side oil rail between injectors and the rail. So far I have installed a new rail on passenger side, installed new o-rings in the tops of all 8 injectors, new hpop, ipr, icp, stand pipes and plugs and of course the updated stc came with the new pump. Any help would be great!

 

[ghohouston]

Did you replace the dummy plugs along with the stand pipes?

 

[Derkperk]

Did you replace the dummy plugs along with the stand pipes?

That's about all that's left.

 

[HuSlungDu]

Yes I replaced both stand pipes and dummy plugs.

 

[6.0dirtworker]

Whats your ipr %? Any contaminants on the screen from when you last checked?

 

[HuSlungDu]

Ipr is at 84.76. Also no contaminants.

 

[Mixedbreed]

Something is leaking. Pinched or eroding o-ring or something. Can a cyl contribution test give you an idea of a injector issue? Or the old air test seems to work.


I retread and saw the air test was done. My bad.

 

[HuSlungDu]

Yes, I agree something is leaking. When I pressure tested it, I had the hpop removed and a stc flipped upside down to seal off the branch tube. I could still hear leaks from passenger side. I'm wondering if the injectors themselves can develop a leak.

 

[Mixedbreed]

Sounds like it. If your still down to the block with no HPOP you can easily take the valve covers off and pull the oil rails. Hopefully the bad o-ring is easily spotted.

 

[HuSlungDu]

In case any of you are interested, I installed a new set of injectors and the problem is fixed.

 

[6.0newb!]

Good to know, thanks for coming back with a fix!

 

[Mixedbreed]

Did you see any bad o rings ?

 

[HuSlungDu]

no, there was nothing visible causing the problem. still stumps me.