Weird Problem

Crmsntide27 · #1 (**permalink**) 11-21-2010, 08:52 AM

So I've been trying to get my truck running for the past month. I just put in a new turbo, new injectors, new airdog II, new regulated return, new HPOP, new IPR, new heads, and new gaskets. The truck will run awesome for about 2 minutes or so and then start loping and injectors will start missing then it will just die. After a couple of minutes it will start back up and do the same thing. I have a constant 60 PSI of fuel pressure. The FICM tested out fine. Could it be glow plugs, glow plug relay, or maybe cam position sensor? I have no idea and this is starting to get really frustrating considering this is basically a brand new engine.

Crmsntide27 · #2 (**permalink**) 11-21-2010, 12:06 PM

Any thoughts?

**kingranch89** · #3 (**permalink**) 11-21-2010, 12:14 PM

sounds pretty weird im sure someone will be along to help you out nice truck though

nitrogen · #4 (**permalink**) 11-21-2010, 07:17 PM

it starts good and runs good for several minutes then stalls? could be an injector didn't fully seat and is venting combustion gas into the fuel rail. similar symptom to running out of fuel. gp's/relay no chance at all if its started and run for 2 minutes the glowplugs are not in play. CPS maybe but very unlikely, unlike the 7.3 the 6.0 has had a very good CPS

Crmsntide27 · #5 (**permalink**) 11-21-2010, 09:16 PM

Pretty sure its a high pressure oil leak. If the oil pressure is under 500 psi the pcm will not tell the injectors to fire.

npccpartsman · #6 (**permalink**) 11-22-2010, 12:20 AM

I'm with nitrogen. Sounds more like a combustion leak into the fuel rail although with a regulated return it's gonna be hard to find out which injector. If you had a high pressure oil leak that bad you'd never get it to crank in the first place, but you can check the ICP and IPR values cranking and find out.

nitrogen · #7 (**permalink**) 11-22-2010, 04:29 AM

its a pain but if you can split the returns back to the tank and splice in a piece of clear hose you will see bubbles from one side or the other. as to which one, its only a guess but i'm thinking that you are dropping more than one injector, so the bubbles are passing back down the head and stalling out all the injectors on that bank. start from the front and work back. soot above the copper seal is ver bad

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