2003 F350 won’t start
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8th Gear
Joined: Oct 2017
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2003 F350 won’t start
Pretty new to the diesel scene. Has egr delete kit, 175cc/30% injectors, and sct livewire tuner with custom tunes. Bought it about 2 months ago. It had a code getting thrown for injector #6 high voltage(P0277). It threw another code for injector #4 high voltage(P0271) about a week ago. Now it won’t start just cranks and cranks. It does sound like it wants to start but it won’t hold an idle. When it does start it idles really rough and almost sounds like it loping. When I drive it down the road it only hits about 40 mph. I changed the oil, oil filter, and the fuel filters. Tested the FICM and has a steady 48v. Changed the ficm harness. At this point Im lost on what else it could be. Anyone have any ideas?
Fleet Owner
Joined: Apr 2012
Posts: 27,307
Likes: 549
From: Spanaway
Return it back to stock tuning. That males things act the way they should
and then we can start the testing, Other wise things can be a bit funny,
Also can you post the code numbers from before?
and then we can start the testing, Other wise things can be a bit funny,
Also can you post the code numbers from before?
Postmaster
Joined: Aug 2015
Posts: 3,910
Likes: 18
From: NW IA
Still possible it's the logic side of the FICM, but here is a good thread where Rusty has some checks you can do.
https://www.ford-trucks.com/forums/1...271-p0277.html
https://www.ford-trucks.com/forums/1...271-p0277.html
Fleet Owner
Joined: Apr 2012
Posts: 27,307
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From: Spanaway
Any that have showed up.
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8th Gear
Joined: Oct 2017
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Update: Did a buzz test and 3 injectors were out. Started replacing with stock size injectors. Just ran a buzz test after finishing the install of the driver side injectors and it’s throwing injector #6 circuit high. I’m going to look into a bad ficm next.
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Fleet Owner
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From: Spanaway
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Thread Starter
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8th Gear
Joined: Oct 2017
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Finally got some time to work on the truck. Got all the injectors replaces and checked the wiring. Don’t have any codes thrown and they all pass an injector buzz test. Now I’m not getting any fuel to the upper fuel bowl. I replaced the fuel pump but I’m lost. Any help would be much appreciated.
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8th Gear
Joined: Oct 2017
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Replaced the hfcm and got the truck started. It’s running 10x better then before but when I drove it down the road it acts like it’s in limp mode. Won’t go over 30 at wot and the turbo barks when I let off the throttle.
