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I’ve been building a 1976 F-250 Ranger 360 5.9L 2 barrel Motorcraft 2150. I rebuilt the whole engine, went through the brakes, steering, and axels. Now I’m to the point of just working out kinks. One of them is that the engine will just stop firing once it gets hot. I replaced the ignition coil and wiring for the ignition coil. I also tested my ignition module and that’s all good. I suspect it may be something to do with vacuum. I have almost all the vacuum ports plugged. Is there anything I should unplug? I suspect the culprit may be the vacuum ports the distributor advance is between.
The fuel could be boiling in the carb when it gets so hot and it could cause the fuel to seep into the motor and flood it out, next time it does it hold the pedal to the floor and if and when it starts, let off the gas. (Obviously)
What do you mean by it stops firing? Like does the truck shut off on its own or does it not want to restart after you shut it off when it is hot? Are you sure it’s an ignition issue? If it just doesn’t want to restart, see the post above.
Originally Posted by Beag's Outdoor Extreme;[url=tel:20484758
20484758[/url]]The fuel could be boiling in the carb when it gets so hot and it could cause the fuel to seep into the motor and flood it out, next time it does it hold the pedal to the floor and if and when it starts, let off the gas. (Obviously)
You could be right about that. The last time I drove it and it died, I was able to somewhat “butterfly the throttle” I could get it to run for second then when I let off the gas it would die.
Originally Posted by Beag's Outdoor Extreme;[url=tel:20484760
20484760[/url]]What do you mean by it stops firing? Like does the truck shut off on its own or does it not want to restart after you shut it off when it is hot? Are you sure it’s an ignition issue? If it just doesn’t want to restart, see the post above.
I’ll be mid drive, then the throttle will just stop and then it dies.
Maybe when the fuel begins to boil, it floods into the motor causing it to well, flood and die. Make sure your fuel lines are away from hot surfaces and the float height is set right.
Originally Posted by Beag's Outdoor Extreme;[url=tel:20484795
20484795[/url]]So like the key was turned off?
The key was turned on when it died. I turned the key off, then cranked while pushing the throttle, then when it fired I stopped cranking. If I let off the throttle it would die.
I would double check float height on the carb to make sure it’s not too high and flooding into the engine. I know with older Holley carbs there is a little screw in the side of the bowl and you pull that out while the vehicle is idling and you want the fuel to just barely come out of the hole or just be in the threads. It may be similar to the carb you have. The newer Holleys have a sight glass in the side of the bowl that you want the fuel to be right in the middle of.
Originally Posted by Beag's Outdoor Extreme;[url=tel:20484799
20484799[/url]]Maybe when the fuel begins to boil, it floods into the motor causing it to well, flood and die. Make sure your fuel lines are away from hot surfaces and the float height is set right.
How can should I do that? Also why would Ford design it this way if this would happen?
Someone may have been in there messing with fuel line before and they most likely aren’t the factory lines, just make sure they aren’t on anything that gets hot and go from there. Here is a good one on adjusting the float height.
Next time it konks out hot, try pouring cold water on the ignition box on the fender. Mine started doing that, but thanks to a post here, I was ready just by chance, poured my frozen coke on it, fired right up. When testing in the NAPA store, it's cold compared next to that engine. Mine wiorked cold, but it was a hot afternoon when it konked out.
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