No start after fuel system work - Ford Powerstroke Diesel Forum
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post #1 of 6 Old 11-23-2012, 07:22 AM Thread Starter
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No start after fuel system work

Have an '08 f550 with a 6.4l in our shop right now. The truck was running down the highway fine and just quit. Upon inspection we found the fuel tank had been crushed. We replaced fuel tank, in-tank fuel pump, fuel filters, and bled the system. Before the work was done we had about 7000 psi fuel rail pressure, now its anywhere between 90-2400 psi. Sitting for a while seems to help increase the pressure but it drops off. We also changed the CMP sensor (under direction of Ford). I also tested the CKP sensor and it tests out fine. The truck wont fire and barely fires with a sniff of ether. Is it possible there could still be air in the system? We have been bleeding from the filter housing, cooler lines, and a high pressure line that goes from HPFP to the left side valve bank. Had inactive codes p2291 (low injector control pressure) and p0231 (low voltage to fuel pump) but both codes have cleared themselves. Tested all applicable fuses, relays, diodes, and reset the fuel shut off switch. Need some suggestions, this truck has been here way too long. Truck is factory stock, no programmer or egr delete.
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post #2 of 6 Old 11-25-2012, 12:25 PM
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Normally just turning on and off the key 5 or 6 times waiting for the in-tank pump to stop primes everything you need. You could try that and see what happens...

.

2008 F350 Lariat - 6.4L Auto, Crew Cab, DRW, long bed, 4x2 and 4.10 gears. Mods - ARP Head Studs, EGR delete, DOC/DPF delete, S&B Intake and Spartan tuning.
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post #3 of 6 Old 11-26-2012, 03:06 PM
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Quote:
Originally Posted by Gerry View Post
Normally just turning on and off the key 5 or 6 times waiting for the in-tank pump to stop primes everything you need. You could try that and see what happens...
+1 sounds like you might have air in there.

97 F250 ECLB
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post #4 of 6 Old 11-27-2012, 08:36 AM Thread Starter
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I have tried the key cycling thing a few times. We have not gotten any air out of the system for a while now, seems to be well bled unless the high pressure fuel lines are still full of air. Is that possible? If it is how would a guy bleed them? Would like the keep the valve covers on if at all possible.
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post #5 of 6 Old 11-27-2012, 05:30 PM
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there is no in-tank fuel pump. did you replace the framerail pump under the drivers door?

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post #6 of 6 Old 11-30-2012, 08:10 AM Thread Starter
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We recently found out that it is indeed not a pump in the tank. no the lift pump was not changed as it seems to be working fine
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