Desperate. HPOP Fitting miscue! - Ford Powerstroke Diesel Forum
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post #1 of 4 Old 12-20-2010, 08:23 AM Thread Starter
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Desperate. HPOP Fitting miscue!

'05 F250: After having trouble with warm engine hard starts, my truck finally wouldn't start at all. After considerable research and advice I took out my HPOP to replace the STC fitting with the 'kit'. Turns out this has already been done by previous owner. There doesn't seem to be a leak from this fitting at all. Before I put all of this back together, can someone give me some advice on where to look next? Injector O-rings? IPR? (how would I know if the IPR is bad, and would it produce the warm start/no start symptoms?). Ugh. I know I can I know I can!
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post #2 of 4 Old 12-20-2010, 11:26 AM
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Unplug the ICP sensor and see if it runs.

Maybe replace your dummy plugs in your oil rails for good measure. Other than that you'll need to be able to watch live data and also do an air pressure test on the HPO system to listen for the leak.

Since you have the pump out replace the fitting anyway's since you already have it. Make sure the o-ring is in the top of the branch tube manifold where it bolts to the HPOP fitting also.
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post #3 of 4 Old 12-20-2010, 11:50 AM
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Not just the dummy plugs replace the stand pipes as well in the oil rails while your in there, STC is common but not as common as the dummy plugs and stand pipes. As for testing if you can get an air fitting that can plug into your icp port you can charge the system, and take the oil filler cap off to hear the leak.

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post #4 of 4 Old 12-20-2010, 12:14 PM
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Maybe dummy plugs and stand pipes.

p2291 help
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