Po1316 p344 - Ford Powerstroke Diesel Forum
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Old 02-03-2014, 05:45 AM
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Exclamation Po1316 p344

So two weeks ago my truck dies in the drive way won't start back up. Changed the cps. Nothing no change. Pull the icp oil runs out of it change the icp still won't start. Pull the wire harness off icp starts right up plug the wire back into the icp runs fine. Everythings good for a few weeks put a fuel pressure gauge on it omg its high 80s. Today runs fine then bucked headed to town ses light comes on fuel pressure is 98 psi. Pull code po1316 clear it go two more miles bucks again ses light same code does it two or three more times then it dies going 60 mph. So i pul the codes po1316 and p344 i think so i head back home. Reset the codes and they keep coming back but the fuel pressure is way to high. I changed back to a stock spring and the fuel pressure is off the scale. Put the 65 psi spring back in and it is 98 psi. Where do i start guys help. Trucks a 99 f350 with a dt-tuner terminator 500 hp oil pump. Boost fooler high pressure crossover fuel line. I believe everything else is stock

Last edited by Jbrower; 02-03-2014 at 05:57 AM.
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Old 02-03-2014, 08:27 AM
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The fuel poppet was sticking and the blue fuel pressure spring is to stiff. Cleaned everything put the stock spring in and the pressure dropped to 60 psi. Put the blue spring in and my pressure goes to 90 psi. So one day i will trim the blue spring put for now the stock spring is working all the codes have been cleared and haven't returned.
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