94 f250 hot no start - Ford Powerstroke Diesel Forum
 
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post #1 of 10 Old 11-20-2019, 05:33 PM Thread Starter
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94 f250 hot no start

Hello all,
I have a 94 7.3 DIT with about 186k miles on it, i just replaced the GPR and fuel bowl heater, and when the engine is cold it starts like a champ but once the engine comes up to temp and I shut it off (and go do my grocery shopping) it will not start it just cranks and does not fire, funny thing is I have no loss of power, no misses, no check engine light when it is hot and running, but if I shut it off it won’t start up again, after the engine cools off (usually 1.5 -2 hours ) it will start fine.
After some googling and looking at forums I changed the ICP sensor but no change. I’m a bit stumped
Thank you all in advance

Green
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post #2 of 10 Old 11-21-2019, 09:12 AM
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You could have bad Injector Pressure Regulator (IPR) or bad Injector O-rings. The less viscous hot oil will bypass the O-rings causing a lack of pressure buildup and a no-start when hot. I would start with an IPR Reseal Kit and see if that fixes it. If you want to check for bad injector O-rings, you'll be using a lot of oil or, if it's leaking from the top set, it will be leaking out around the base of the injector (look with the valvecovers off and cranking). Cheers!

1997 F250 SC 4x4, E4OD, 4.10 LS, Basically Stock, Relocated Block Heater Plug, External Trans Filter, Tru-Cool Max, I/C Mounted but not Plumbed

SOLD - 1994 F350 CC DRW 2WD PSD, 5 Speed, 4.10 LS, SBC Con-O, Baldwin Filter, Tymar HPX Hose, DPPI DP, Bilsteins, $12 AIC, Coolant Filter, Explorer Overhead Console, A-Pillar w/ISSPRO Black Ice, EV Boost, and EV Pyro, Modified Pedestal, Gutted EBPV.
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post #3 of 10 Old 11-21-2019, 10:12 AM Thread Starter
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Awesome thank you I will look into an O-ring kit. While I am waiting for that to come in is there a way the I can test the coil on that IPR
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post #4 of 10 Old 11-21-2019, 10:42 AM
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Check the resistance of the coil. It should be 8-16 ohms. Cheers!

1997 F250 SC 4x4, E4OD, 4.10 LS, Basically Stock, Relocated Block Heater Plug, External Trans Filter, Tru-Cool Max, I/C Mounted but not Plumbed

SOLD - 1994 F350 CC DRW 2WD PSD, 5 Speed, 4.10 LS, SBC Con-O, Baldwin Filter, Tymar HPX Hose, DPPI DP, Bilsteins, $12 AIC, Coolant Filter, Explorer Overhead Console, A-Pillar w/ISSPRO Black Ice, EV Boost, and EV Pyro, Modified Pedestal, Gutted EBPV.
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post #5 of 10 Old 11-21-2019, 05:18 PM Thread Starter
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Fantastic I will check that thank you
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post #6 of 10 Old 11-21-2019, 08:05 PM Thread Starter
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Awesome I will check that
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post #7 of 10 Old 12-02-2019, 03:39 PM Thread Starter
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Just wanted to post an update, i tested the ohms on the IPR coil, it read right around 12. I also put an o-ring kit in the IPR and cleaned it as thoroughly as I could. Reinstalled the IPR and it is still a hot no start. I considered that maybe the battery’s might be a problem (not enough rpm when the oil is hot) both batteries will only hold a 70% charge and have a dead cell. So I put new batteries in and I am still having the same problem. I have an OBD2 Bluetooth adapter and torque pro app, and when the engine is hot and cranking, the app Is telling me that the HPOP psi is reaching 371 at max
And the IPR percentage is at 49.1
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post #8 of 10 Old 12-02-2019, 03:46 PM Thread Starter
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Lol I just reread your first post
And checking the injector o-rings is the next item on my todo list
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post #9 of 10 Old Today, 05:49 PM Thread Starter
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So I was able to get into the injectors today and the second one from the firewall on the passenger side was spraying oil changed the o-rings and presto she starts hot 😁 thank you for all the help
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post #10 of 10 Old Today, 06:12 PM
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That would definitely do it! Glad you got it fixed. Cheers!

1997 F250 SC 4x4, E4OD, 4.10 LS, Basically Stock, Relocated Block Heater Plug, External Trans Filter, Tru-Cool Max, I/C Mounted but not Plumbed

SOLD - 1994 F350 CC DRW 2WD PSD, 5 Speed, 4.10 LS, SBC Con-O, Baldwin Filter, Tymar HPX Hose, DPPI DP, Bilsteins, $12 AIC, Coolant Filter, Explorer Overhead Console, A-Pillar w/ISSPRO Black Ice, EV Boost, and EV Pyro, Modified Pedestal, Gutted EBPV.
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