Need HELP

[dhr05b]

I recently got a no hot start issue, and code P2291. Last May I did the EGR/oil cooler work and replaced the STC fitting while I was at it. This time I'm doing standpipes/dummy plugs in hopes that this is the issue. After replacing the standpipe and dummy plug on the driver side, I stupidly broke off a bolt in the valve cover. Half of it is still in the threads, while the other half is sitting on my workbench. For inquiring minds, it's the bolt that is threaded for a 10mm nut that the oil dipstick tube attaches to.

My question is, what are my options? I've spent some time at the Tousley parts website but can't seem to find what I'm looking for. Obviously I need to get this thing back together as soon as possible. Any help on where I might be able to find another bolt, etc. would be appreciated. I suppose I'll check with the dealership in the morning in the meantime.

[dhr05b]

I was able to sort through my problems. Very fortunate today (somewhat). I was able to carefully drill into the valve cover bolt and remove it without damaging anything, get a replacement bolt, and finish the standpipe/dummy plug effort today. Of course, starting the truck took several cranks, but it lit and I took it out for about 30 minutes. Throttle response did seem a little delayed at times.

After coming back in, I shut it off for 30-45 seconds and tried to start it again. Same no start condition... after letting sit for 15-20 minutes I tried to restart to get my ICP numbers: ICP_V is at .6; ICP_PSI is at about 305. I know that if I let it cool down enough, it will build the minimum 500 PSI to start up; but with the ICP sensor plugged in, it just cranks and cranks.

After unplugging the ICP sensor, truck still struggles to start up, but it does (I'm thinking there might be some air still trapped in the system?). ICP_V is at 0 (of course); ICP_PSI at about 652.

Would this indicate a bad sensor? I can't really tell if there is oil on the plug or around the base of the sensor, and I can't see any wire chaffing, but this is what I'm leaning towards as I have about checked everything else off the list.

As I said before, last May I updated the STC fitting, replaced the IPR screen, and have now updated the standpipes/dummy plugs. (Slowly but surely I'm building a rock-solid rig). Any help or advice would be appreciated

2006 6.0
104,xxx miles

[ps_lane01]

Have you performed the air leak test yet? And by the way, i replaced ipr with brand new factory part and it shortly failed internally so dont rule that out.


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[dhr05b]

Thanks for the idea. I wanted to post what the issue finally was to save somebody some trouble. An air leak test would have told me a lot sooner, but we finally discovered the problem was the STC fitting - not the fitting itself (as I had already replaced it), but the o-ring on the back side of it. Apparently I did not torque it down properly, as the oil pressure eventually tore the o-ring.

Without performing an air test, we had been able to check several things off the list: standpipes/dummy plugs; ICP sensor; IPR (replaced screen); and STC fitting (so I thought). My inattention to torque specs 10 months ago caused all of this.

Moral of the story - run some air through the system to find your leak(s). Throwing parts at it is expensive.

[ps_lane01]

Glad you got it running again and thanks for the update!


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