86 f150
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Freshman User
Joined: Apr 2011
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86 f150
My truck is acting funny lately I'll be driveing and it will shut off randomly but if I turn the ignition it will crank and start right up it has a new coil and ignition control module any ideas
Elder User
Joined: May 2012
Posts: 978
Likes: 1
From: Covington VA
Loose wire somewhere maybe? Maybe shorting the spark out after a certain dorection turn or bump then when the motor stops the vibration or torqueing angling of the frame it fixes itself? Or maybe fuel system gets clogged and when the vac breaks whatever it is doing it is released?
Lead Driver
Joined: Jul 2009
Posts: 6,477
Likes: 19
From: Sheffield, AL
My son's 1984 did a similar thing, years ago. Echoing what JayzDaddy said, try this. With the engine running and the hood open, VERY CAREFULLY grab part of the wiring harness as well as exposed wires and gently shake or tug on them. I did that with my son's truck and fortunately, quickly located a wire that when wiggled, caused the engine to stutter. This particular wire had rubbed against the bottom of the air cleaner housing.
A quick repair [electrical tape] and the problem was gone.
Do be careful and watch for the fan and v-belts [or serpentine].
Good luck!
A quick repair [electrical tape] and the problem was gone.
Do be careful and watch for the fan and v-belts [or serpentine].
Good luck!
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Freshman User
Joined: Apr 2011
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I wiggled the wires nothing happened but I was sitting in the truck and it was just idling and shut off when I went to start it it's like I lost spark I know the fuel pump was running so I assume I had fuel
Junior User
Joined: Jul 2013
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Did you check the rotor or any contacts inside the distributor cap take some emery cloth in there and make them shine. If the rotor is worn try to bend it and start it again. That has gotten me to a parts store before. But the rotor should be replaced before it wears out the coil if it is worn down. Good luck let us know the updates.
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Freshman User
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I didn't check the distributor cap or rotor but it's fairly new so I would hope that's not it I took it to local mechanic who specializes in wiring
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