I have a 1966 F100 with a 360 I've been having issues with for about 2 months.

On my way to work, about a 20 mile drive, the truck began to act as though it was flooding out. As I decreased my speed when I got to the city limits, it would surge and sputter. I pulled into a parking lot, popped the hood, then it started idling evenly and ran fine the rest of the way to work. After work, it started doing this immediately upon start up and lasted until the engine warmed up. When I got home I looked for any apparent cause for this and found nothing.

I attempted to take it to work again the next day and it did the same thing. This time it stalled and I was unable to get it started again. Hours later I was able to get it started with ether.

From then, until now, I've tried troubleshooting in the limited time I have. The need to start it with ether is intermittent, but it always starts rough and will smooth out after warming up. I first thought it was a choke issue. I wired it open and the same occurred. I disconnected it from the battery and still the same. I thought perhaps a valve seal but there's no smoke coming from the pipes when I start it up. The oil has a very slight smell of gas, but not much. It is not thin nor discolored.

Pretty much at a loss and any help/pointers would be very much appreciated.

Thanks in advance!

 

I would start with a tune-up: plugs, points, cap & rotor, fuel filter, oil change. Rebuilding a carb isn't hard to do, since the kits come with instructions and an exploded view. Check all rubber fuel lines and replace if cracked.

 

My apologies, I really should have included in the original post the following:
In the last year I've replaced the plugs, wires, cap/rotor, Pertronix module, coil, filters, and the carb itself.

A rebuild probably would be the way to go. Even though the carb is barely a year old, I know that doesn't mean anything. Really hoping it's a seal on the carb on not something with the engine.

 

Just rebuilt the carb on my 352. It had new plugs, wires, and everything in, and on the distributor. Cleaned the tank, and replaced the rubber hoses. Wouldn't start, Replaced the fuel pump, and fired right off, and smooth as silk. Just have to go one step at a time. Good luck. Bob

 

Pertronix #1 & fuel pump #2

 

Is it possible you have a little rust in the gas tank? Very fine particles can get past filters and cause intermittent problems: the rust buggers things up then falls away, and the symptoms disappear as the fuel pressure drops... Just an idea.
Eric

 

Will check into all the above as I have time. Thanks, all, for the advice, I appreciate it!