Odd stalling issue

willp728

Active Member
Joined
May 27, 2015
Location
Fuquay Varina
I have a 1966 F-100. It has a pretty warm 460, C6, NP205, 9" & D44. Not sure if any of that matters for this, but there it is. The ignition system is a Mallory unilite distributor, MSD 6A box and parts store coil. The fuel system id a Summit Racing mechanical fuel pump and holly 750.

Now to the issue, When starting the truck cold, could be a few hours to days, it fires right up, I let it warm up and take off. After about 5 minutes of driving it cuts off, and is a bit of a pain to get to re-fire, but not too bad, 2 cycles of pumping the gas and holding the key for about 10 seconds, but fires back up and runs fine. About 1-1.5 minutes after that fun exercise it does it again, but re-fires after a little trying. About another 1-1.5 minutes after that it cuts off a third time, and the same process repeats, but it does fire back up. Runs like a champ after that. It's like clockwork, it will stall 3 times every time. I have a glass fuel filter right before the carb, and when it stalls there is gas in it, so I'm not sure its emptying the bowls and filling them back up, and I don't know how it would do this exactly 3 times and then be fine. Any ideas? I'm out of them
 
If there is a porous bronze filter in the glass bowl gas filter try running without it .
 
To be sure, let it die out on you. Pop the air cleaner off and pump the throttle to see if the accelerator pump is squirting fuel. If it is squirting then you know there is fuel in the bowls.
 
Next time it does it's trick I'll see if the carb will squirt fuel. It just seems that I don't have to crank on it enough to fill up the bowls, and why would it do it just a few times? Just very confusing to me. And the hog gets 7mpg, it seems it would take a lot less time to empty the bowls than the time it does run the first time off the bat.
 
Could be the fuel pump losing its prime if it's still got a mechanical pump -- just read the OP again where you had fuel in the filters
 
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