Fuel Shut Off Switch Problems - Diesel Forum - TheDieselStop.com
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6.0L Power Stroke Engine and Drivetrain Discussion of the 6.0L Power Stroke diesel engine and drivetrain in the 2003-Up Super Duties and Excursions. No gas engine discussion allowed except on transmissions and drivetrain that pertain to all models. Please confine discussion of topics in this forum to those items that are specific to the 6.0L Power Stroke engine.

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Old 11-09-2008, 06:40 PM   #1 (permalink)
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Fuel Shut Off Switch Problems

This will be the second fuel shot off switch malfunction ive had for two weeks. Apparently the switches keep going bad and its starting to wear on me because i keep getting stranded. it never shuts the fuel off when its running. but sometimes when i turn it off and leave for a couple hours it will start for a split second then shut down. i dont know if the wiring is bad or not, so the other day it did it to me again so i unplugged it and tied the wires together to bypass it. it worked. It made it one full day with the bypass now its doing it again even with the wires bypassed so i dont know what to think. ive got a edge chip in it but that shouldnt harm the fuel shut off right?
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Old 11-09-2008, 08:56 PM   #2 (permalink)
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I don't recall hearing anything about the Inertia Fuel Shutoff being faulty.
I would check pin fit. the chip should not have anything to do with it..
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Old 11-09-2008, 10:02 PM   #3 (permalink)
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when it did it before what the switch actually set off? was the little button popped up
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Old 11-11-2008, 01:20 PM   #4 (permalink)
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the switch was down, it did not pop up. Im putting in a new switch today and if it trips it again and i cant get it to start then im getting a wiring diagram and finding the route of the wiring from the intertia switch to the actual fuel pump and im bypassing it. Should I? or just pay the money to find the problem. i dont know what to do..
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Old 11-11-2008, 07:40 PM   #5 (permalink)
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I hate the new style inertia switches with the rubber boot. I always swap them out with the old style ones without the boot. Never had a repeat issue.
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Old 11-11-2008, 08:07 PM   #6 (permalink)
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Quote:
Originally Posted by born2ride View Post
the chip should not have anything to do with it..
???? Get the chip out of the picture first. If the concern still happens, nowe we can work with it....
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Old 11-12-2008, 12:18 PM   #7 (permalink)
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Quote:
Originally Posted by GrampyJim View Post
???? Get the chip out of the picture first. If the concern still happens, nowe we can work with it....

What would a chip have to do with a fuel cut off?

Do you need the diagram let me know.
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Old 11-12-2008, 08:26 PM   #8 (permalink)
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yes a diagram would be great.. everybody keeps telling me trade my ford and the only reason im not is because of great people on this website like you who help me through these problems. i found out that the inertia switch is connected to FP sensor and then runs to the fuel pump which is called DFCM Mod. I dont know which fuel pump this is. So can anybody tell me what fuel pump this is that would be great.
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Old 11-13-2008, 12:21 PM   #9 (permalink)
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I dont see the year and model of truck..Can you supply me with it the I will get some pixs for you..
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Old 11-15-2008, 02:52 PM   #10 (permalink)
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the truck is an 2004 6.0 f250. auto trans. ect
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Old 11-15-2008, 07:35 PM   #11 (permalink)
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We have no idea of what or how the switch is failing... Hell, we don't even know what year the truck is. Did we miss the OPs comment "now its doing it again even with the wires bypassed "?

The guys concern is that the truck wont start... I think that changing "the switch" is a red herring.... I rarely see bad IFS switches... this guy has a herd of them.... You do the math...

Yes, K..... I'm a bad boy....
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Old 11-15-2008, 08:18 PM   #12 (permalink)
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diagram
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Fuel Shut Off Switch Problems-04-fuel1.jpg  
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Old 11-20-2008, 01:36 PM   #13 (permalink)
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Thanks for the diagram. i look forward to sending it to my mechanic. Maybe he can figure it out cuz im completely clueless.
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