BIG Problem!!!
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Elder User
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From: Wasilla, AK
BIG Problem!!!
My 2001 F350 7.3 PS has got a big problem. The service engine soon (SES) lite came on yesterday on the way to work and the engine started running ruff, surging. This morning I got it fired up but it stalled a couple of times before I could get it into my buddy's shop. Anyhow the SES went out while I was driving to the shop. I pulled the driver side valve cover and sure enough the injector harness had came loose so I did the quarter thing to the harness and buttoned up. I started it and it ran really good but the SES was still on. I backed it out to do a test run around the block and only made it about a hundred feet and it just quit. It spins over but I have no Wait To Start (WTS) lite are SES lite and it won't fire a lick? Anybody out there got a clue? Any help would be appreciated. Please don't tell me it's the ECM!
Cargo Master
Joined: Jan 2001
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From: Slatington, PA
Check fuse #30 in your under hood fuse box, its a 30 amp maxi fuse. If its blown, your fuel bowl heater most likely shorted out and blew the fuse, which also happens to power the PCM. The heater is located on the back of the fuel bowl. Its a single wire that goes onto a stud. Pull that wire off, replace the fuse, and see if you get the WTS light.
Snowboard season cometh..
Joined: Jan 2006
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From: Gulf Coast of Florida
If you look around you'll find that there is a forum for the '99 - '03 7.3 PSD - since it's an engine related issue, you'll probably get better results in an engine-specific forum.
Given that your location is listed as Alaska, could it be gelled fuel? Do you use additive to help fight against that? Do you have access to a heated garage where you could leave the truck so that it warms up enough to cure/eliminate that possibility? Doesn't sound like it but best to be sure. I'd get some additive in that tank ASAP.
Like others have said, check your fuses. #30 is for the fuel bowl heater. If this blows, it also takes out power to your pcm and NO WAY you'll start. You can unplug that heater element (located at the lower back of your fuel bowl) and either leave it that way or replace it (parts HERE)
Are you batteries good? Have you had them checked? How old are they? How good is your alternator?
Given that your location is listed as Alaska, could it be gelled fuel? Do you use additive to help fight against that? Do you have access to a heated garage where you could leave the truck so that it warms up enough to cure/eliminate that possibility? Doesn't sound like it but best to be sure. I'd get some additive in that tank ASAP.
Like others have said, check your fuses. #30 is for the fuel bowl heater. If this blows, it also takes out power to your pcm and NO WAY you'll start. You can unplug that heater element (located at the lower back of your fuel bowl) and either leave it that way or replace it (parts HERE)
Are you batteries good? Have you had them checked? How old are they? How good is your alternator?
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From: Wasilla, AK
Brendan,
To answer your questions:
I did post in the 99-2003 PS List also. I posted in both to see if I could get a fast answer. No patience I guess.
I've used Power Service in all three of my diesels for years besides it's 20 above and I'm using #1 fuel. But the thought did hit me so I drained the filter while I was in the shop just to be sure it wasn't jelled and there wasn't any water in the filter bowl. It was in heated garage for five hours while I fixed the injector harness.
The first thing I checked was the fuses under the dash and hood but it was starting to get dark (3:00 pm) and I probably missed seeing it but I'll check tomorrow when it gets daylight.
Thanks for the help, I'll let you know what transpires.
Tim
To answer your questions:
I did post in the 99-2003 PS List also. I posted in both to see if I could get a fast answer. No patience I guess.
I've used Power Service in all three of my diesels for years besides it's 20 above and I'm using #1 fuel. But the thought did hit me so I drained the filter while I was in the shop just to be sure it wasn't jelled and there wasn't any water in the filter bowl. It was in heated garage for five hours while I fixed the injector harness.
The first thing I checked was the fuses under the dash and hood but it was starting to get dark (3:00 pm) and I probably missed seeing it but I'll check tomorrow when it gets daylight.
Thanks for the help, I'll let you know what transpires.
Tim
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Elder User
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From: Wasilla, AK
Pretty good I guess, haven't seen her are Todd in a couple of days though? I think they were going down to Houston to do some Christmas shopping. You know, new cowboy boots and stuff?
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Elder User
Joined: May 2008
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From: Wasilla, AK
Update: It isn't the Heating element fuse(#30) under the dash. It's keeps blowing the #24 in the distribution panel under the hood (PCM Power fuse). Changed the PCM power relay (#30) also, no luck? Guess I'll have to get it towed to the diesel shop and have them diagnose it and get it running. Back to thinking shorted PCM? Thanks for the input it helped the learning curve anyhow.
Tim
Tim
Cargo Master
Joined: Oct 2010
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when the pcm relay closes, it also provides power off of fuse 24 to the red wires on GPR, air intake manifold relay, ipr, reverse light switch, brake pressure switch at master cylinder for disabling cruise, contacts for fuel pump relay, pins 71 & 97 of PCM.
You might try unplugging a few things b4 u change pcm.
You might try unplugging a few things b4 u change pcm.
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Elder User
Joined: May 2008
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From: Wasilla, AK
It's Fixed!! The dealership repaired the cruise kick down control on the master cylinder after a recall. The idiot wrapped the wires around the steel brake line and it shorted out. Got it repaired and reprogram with the new PCM upgrade programming from Ford, new IPC and it's running great. Thanks for all the help.
Tim
Tim
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