1997 F350 Died while driving - PowerStrokeNation : Ford Powerstroke Diesel Forum
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post #1 of 32 (permalink) Old 10-12-2019, 03:10 AM Thread Starter
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1997 F350 Died while driving

Hey there, about a week ago I was driving about 65 mph when truck turned off on me and had to get her towed. I already had the IPR changed to fix a no start issue I had a week before. I've got no CEL, new batteries, new CPS from ford, and new fuel filter. Frankly I'm stuck on what to do. If anyone has any ideas or even fault trees, that'd be amazing. Thank you.
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post #2 of 32 (permalink) Old 10-12-2019, 03:24 AM
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Re: 1997 F350 Died while driving

#22 fuse under hood and if it is blown disconnect the fuel heater on the filter housing

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post #3 of 32 (permalink) Old 10-12-2019, 05:55 AM Thread Starter
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Re: 1997 F350 Died while driving

Hey there, so I checked the fuse and she looked good. Should I still try to disconnect and see if she starts up? Also you wouldn't happen to know any 7.3 fault trees I can keep on my phone just in case.
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post #4 of 32 (permalink) Old 10-12-2019, 06:37 AM Thread Starter
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Re: 1997 F350 Died while driving

So, I did use the torque app to look at some basic stuff (Max was while cranking) Low volt was on old batteries. Heard from a friend if its under 9 when cranking it wouldn't start so I tried changing them out. Anything else I should look up?
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post #5 of 32 (permalink) Old 10-12-2019, 04:55 PM
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Re: 1997 F350 Died while driving

Yup, your friend is right, the pcm needs a few values to be met before it will let the injectors fire.

1) min 100rpm cranking speed
2) 500psi of ICP pressure
3) 10v of battery


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1996 Cali F350 CCFB, 7.3 PSD, 2wd SAS, w/ 378,000 miles.
New Motor at 352,000, DieselSite Legendary Trans at 356,000 and many more
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post #6 of 32 (permalink) Old 10-12-2019, 05:03 PM
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Re: 1997 F350 Died while driving

Check the #22 fuse with a meter, they can look fine and still not be good. This fuse powers the PCM relay among other things and without it nothing works. Also check the #9 fuse under the hood, this one powers the PCM.

With no WTS light this usually means that the PCM isn't getting any power.

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post #7 of 32 (permalink) Old 10-12-2019, 07:54 PM
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Re: 1997 F350 Died while driving

Check fuse 8 as well - that is the IDM fuse. Fuse 17 protects the key switch that supplies power to a couple of the other fuses mentioned.

Cj

1997 F350 CCLB 7.3, Eaton Fuller RTO-6610, 4x4, 3.54, otherwise stock
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post #8 of 32 (permalink) Old 10-13-2019, 12:16 AM Thread Starter
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Re: 1997 F350 Died while driving

So double checked all the fuses with my multimeter and they all checked good. I feel like Iím missing something obvious. Any other thoughts?
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post #9 of 32 (permalink) Old 10-13-2019, 01:49 AM
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Re: 1997 F350 Died while driving

Have you checked fuel pressure while cranking?

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post #10 of 32 (permalink) Old 10-13-2019, 01:53 AM
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Re: 1997 F350 Died while driving

How did it die?

Chugging down the road or like you shut the key off?

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