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start and run 10-20 seconds then die

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Barney
plowboy34
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start and run 10-20 seconds then die Empty start and run 10-20 seconds then die

Post  plowboy34 July 29th 2011, 3:07 pm

86 F250 460, stock ignition system, as said starts right up and runs fine for 10-20 seconds then just shuts off. Pulled in garage one night running just fine then next morning this happened....any thoughts

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start and run 10-20 seconds then die Empty Re: start and run 10-20 seconds then die

Post  Barney July 29th 2011, 4:08 pm

Fuel pump?
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start and run 10-20 seconds then die Empty Re: start and run 10-20 seconds then die

Post  69F100 July 29th 2011, 4:12 pm

Fuel pump ,water in filter and carb or filter clogged check and make sure you are getting gas.if you getting gas check your ing coil
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start and run 10-20 seconds then die Empty Re: start and run 10-20 seconds then die

Post  plowboy34 July 29th 2011, 4:56 pm

don't believe it's fuel cause it will fire right back up. just dies in a few seconds. Somebody told me there was a oil pressure switch that if it showed no oil pressure it would shut off the fuel pumps....is this true. I didn't think a carbed engine would have this.

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start and run 10-20 seconds then die Empty Re: start and run 10-20 seconds then die

Post  56Tbird July 29th 2011, 6:15 pm

That's got the old square electronic ignition box on the the inner fender. It's probably the problem if it does have it
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start and run 10-20 seconds then die Empty Re: start and run 10-20 seconds then die

Post  bbf-falcon July 30th 2011, 7:19 am

56Tbird wrote:That's got the old square electronic ignition box on the the inner fender. It's probably the problem if it does have it

Yea,I had one in the shop that did the same. I have one here(used) if you need it. (FREE)

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start and run 10-20 seconds then die Empty Re: start and run 10-20 seconds then die

Post  plowboy34 July 30th 2011, 3:03 pm

Not the ignition box, put in a new one and does exact same thing. Well at least I have a spare now..... Very Happy . So dang hot just don't feel like messing with it....believe it is so hot here the Devil went back to hell to cool off.

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start and run 10-20 seconds then die Empty Re: start and run 10-20 seconds then die

Post  69F100 July 30th 2011, 3:39 pm

Check the ing coil had the same thing happen to my 69 F100 yes it has the electronic box the blue one had the same thing happen to me one time.Put a new box on it same thing fire up and go dead or then it might run until I touch the gas go dead changed the dizzy same thing so I decided to change the coil fired up ran like a top.I would have never figured it was the coil because most of the time the coil will not fire when it bad but this one would fire until it fired up.

Jim

X2 on the heat was heading to the track but the heat here is well like you said heat index right now at 107*
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start and run 10-20 seconds then die Empty Re: start and run 10-20 seconds then die

Post  maverick532 July 30th 2011, 4:27 pm

simple test do you have a test light ? if not get one . hook test light to good ground and probe terminals at coil with key on both should light up brightly, crank engine over with test light probing negative side of coil should pulse if not you have a bad pickup in distibutor, if no light on negative side of coil before cranking bad coil.

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start and run 10-20 seconds then die Empty Re: start and run 10-20 seconds then die

Post  plowboy34 August 7th 2011, 10:38 pm

Well the fix was the oil pressure safety switch that shuts off the fuel pump in case of no oil pressure. Installed a new one and it's all good....thanks for the help guys

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start and run 10-20 seconds then die Empty Re: start and run 10-20 seconds then die

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