95 460 shuts down randomly
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Junior User
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95 460 shuts down randomly
I have a '95 ford f350 crew cab dually with a 460 in it and dual tanks. We hadn't had any problems until recently when the truck ran cold on a trip. I figured it was the thermostat stuck open so we put cardboard behind the grille to bring it up to temp. Then on the way home the engine shut off. I turned the key off and back on and it started right back up, no check engine light. The next day we drove it again and it did the same thing regardless of what tank was used. I don't know what would cause it. Any advice would help. Thanks.
Fleet Owner
Joined: Oct 2005
Posts: 20,785
Likes: 1,751
From: Kentucky
If swapping the relays does not help you might want to pull out the PCM, it comes out from the engine side of the firewall, then open it up to look for signs of corrosion, moisture, leaking capacitors or burned components.
Post Fiend
Joined: Oct 2003
Posts: 9,176
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From: Western Central NV
I would also check fuel pressures. What about fuel filter. My 95 had 148,000 & the PIP was still fine. Something else on random stuff which can drive a man to drink. Check the top distributor bushing. I had an 86 F250 4x4 460 that drove me to complete insanity. I had a couple of buddies that were good mechanics they messed with it, after about a month of just dying then starting right up again one of my mechanic buddies called me & said bring that truck to my house. Sure enough he pulled the cap & the he could move the shaft enough that every so often the stator would hit the pickup & short out.
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Fleet Owner
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From: Kentucky
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Fleet Owner
Joined: Oct 2005
Posts: 20,785
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From: Kentucky
I wanted to start with the simple and easy things first. The relays are not known for going bad, but it is not impossible. I highly suspect the PCM at this point, but never overlook the obvious (and simple/cheap).
Fleet Owner
Joined: Oct 2005
Posts: 20,785
Likes: 1,751
From: Kentucky
Circuit diagram:
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