Hard starting after "bullet proofing" - Ford Powerstroke Diesel Forum
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post #1 of 7 Old 08-25-2013, 03:03 PM Thread Starter
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Hard starting after "bullet proofing"

So I'm having to crank 10-15 seconds to get my truck to start after doing all the updates and studs. It ran fine before so I'm a little confused. 2005 f250, HPOP stc update, new standpipes and dummy plugs, new oil cooler,egr delete, new orings on oil rail cups, new IPR screen( old one was good no metal), new turbo feed line, blue fuel spring. Motorcraft oil filter and cap. I pulled the icp and plugged in an air line and no noticeable leaks or air back into the filter housing. It seems to be a low oil pressure when cranking issue. I plumbed in a gauge to the icp port to watch it. It shows little or no pressure at the start of cranking, after 10-15 seconds it jumps to 700-800 psi and fires, runs fine, has around 900 psi at idle, at about 1600 rpm it will have close to 2000 psi, so it seems like the HPOP is still working ok. FICM is at 48-48.5v, I pulled the IPR again and it looks ok just a few specs of dirt from assembly but no tears and no blockage. I don't have a way to check IPR duty cycle on my CTS so I'm down to replacing the IPR unless anyone has a better solution?
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post #2 of 7 Old 08-25-2013, 03:18 PM
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How long have you drove it since bullet proofing? If very recent, it could just be air in the system

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post #3 of 7 Old 08-25-2013, 05:56 PM Thread Starter
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I've had it running for about 2 hours over the course of 3 days. It definitely had air in the system on first startup but I would have thought it would be worked out by now.
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post #4 of 7 Old 08-25-2013, 06:35 PM
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Quote:
Originally Posted by 28racing View Post
I've had it running for about 2 hours over the course of 3 days. It definitely had air in the system on first startup but I would have thought it would be worked out by now.
Take it out and drive it pretty hard. Need a couple of WOT runs to get the air completely out of the fuel and oil systems following Bulletproofing. Mine took about 100 to 150 miles to clear up after getting it back from Bulletproofing.

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post #5 of 7 Old 10-12-2014, 07:16 PM
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I have the EXACT same thing, just bulletproofed my X w/ARP's, hardened seats, new HPOP/SCT, standpipe and dummies, ICP and IPR, on and on..

BUT it cranks long (approx. 12 sec), cranks until the low press guage pops up and then starts. I have only drove it a few miles and the % high pressure on my CTS doesn't go above 77%. I think, and hope, it's just air. I did check the filter drainback and there was still about 1-2" of oil after I removed the cap. (ford cap and filter).

Where you able to drive this out of it (air in the system)?

I had to adjust my STC when I put the ford reman HPOP on it didn't line up with the Y pipe, I had to draw it in one rev to align it.
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post #6 of 7 Old 10-12-2014, 08:29 PM
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10-15 seconds to get 700 psi after having it running for a number of cycles after working on it is not acceptable. It could be air, but that is highly unlikely. Either your IPR is sticking, or you have a leak. I would start with a new IPR before checking for HPO leaks. If you are very frugal, you may decide to air test it first, but often the IPR can become suspect after doing any work to the heads.

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post #7 of 7 Old 10-12-2014, 08:39 PM
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The IPR was new with everything. I cleaned the passages very well before assemble. New cooler and screen too.
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