This has happened to me twice now and I dont get it. Ill be driving down the road for a couple minutes then the truck stops running and no matter what I do it will not start. Thinking it was the fuel pump I look down the carb (edlebrock 650 4bbl) and work the throttle to see if fuel comes out. Nothing does. The first time I had it towed the next day we got it started and ran it for like 15 minutes, or until it warmed up. It was fine for the next few weeks and I drove ot every day with no problems until yesterday when the same thing happened. No fuel squirting in the carb. Got it home and left in in the street for about 5 or 6 hours. My dad came home and it started in 2 tries and he was able to get it in the driveway. It is the stock fuel pump but its new, I do have an electric one just havent put it on yet but do you think that would solve the problem?

 

I would start simple, inspect/clean the carb, replace any fuel filter if one has been added, inspect/clean sediment bowl on the fuel pump. I recently had similar issues that I got lucky and solved with changing a fuel filter a previous owner had spliced in.

 

Originally, the only fuel filter on these trucks was a corrugated paper cartridge (C4AZ-9365-B - Auto-Lite/Motorcraft FG-1A) located inside a canister that threaded onto the fuel pump.

Since most people were unaware, they installed an in-line filter, usually in the fuel line between the pump and the carb. Meanwhile, the corrugated filter was getting more clogged up every day.

Autoparts store replacement pumps may have the canister filter, may not have. If not, an in-line filter would be a must install, otherwise there wouldn't be a fuel filter.

The steel fuel line from the tank pokes thru a hole in the cab floor, then there's a short piece of neoprene rubber fuel hose that connects to the steel fuel line that routes along frame rail to the pump.

Some people spliced a in-line filter into this neoprene hose. How many subsequent owners would think to look for it here?

 

Look at all the rubber lines in the fuel system, today's ethenol fuels can and will eat the old OEM rubber lines. The old rubber will get soft and collapse with the pump sucking fuel.

 

Start at the inlet to the carb and see if you have gas and gas pressure if you you have a gage. If you have gas under pressure, it is the carb, if not, then go back from there to the fuel pump , etc.

If it is the carb, check to see if somene has replaced the carb with one that has a fuel filter inside the carb at the inlet. But....... most likely it is a stuck shut float valve, maybe cleaning is all it needs, I would replace it for the fun of it. You should be able to remove the top of the carb to check the valve.

 

Auto-Lite 2100 series 2V's used in 1963 292's have a wire meshed filter screen (9938) at the inlet, but the fuel filter itself was located inside a canister that threaded onto the fuel pump.

1964/72 Auto-Lite 2100's do not have this screen.

 

I am probably totally off base with this question but have you changed out your gas cap recently? If you put on a non-vented gas cap that might cause the issue you are having.

 

In almost 100% pisitive the gas cap is original and its difinately vented you leave it in the sun with a full tank on a hot day and youll have gas all over the ground. My grandpa bout the truck brand new and ive never known anything attached to the gas tank to be replaced. I guess ill just drain the tank and clean it out really good, replace/ clean all the fuel lines and put the electric pump on it. Hopefully that solves it. Also plan on checking the floats in the carb to make sure they arent sticking or something, if that doesnt fix it I dont know what will.

 

If the engine SHUTS OFF while running and won't restart, to me this sounds like an electrical problem. Possibly a bad coil, kinked wiring, defective color coded PINK ignition coil resistor wire
Do you know the entire day by day history of the truck since grandpa bought it new? Unlikely, so you cannot make this statement.

I too bought one of these trucks brand new (1965 F100 352) @ Stockton Quincy Ford in Westwood.

These trucks did not come with Edelbrock carbs, that's for damn sure. Came with Auto-Lite 2100 series 2V's. So what else has been changed since 1966?

The original vented fuel caps were painted body color...and were only available on new trucks. The FoMoCo replacement vented cap was chrome.

There is no vent on in-cab tanks of trucks of this vintage. If a non vented cap is installed, this could cause the fuel tank to collapse. Not pleasant!

Fuel puking out of fuel tanks is caused by a full tank of gas and hot weather, as heat causes gas to expand.

This is a common problem that affects ALL 1961/79 F100/350's with vented or non vented (1970/79 w/Evap Emission) fuel caps with in-cab (1961/77), mid-ship (1967/79) and aft axle (1973/79) fuel tanks.

 

Dollars to donuts the issue is within the fuel delivery system.

Crud from tank working it's way to the carb. I had this problem and installed a clear inline fuel filter from NAPA after the fuel pump and before the carb (I have original carb not Edelbrock). The clear fuel filter will show any crud (you can also take the fuel sensing thing off the tank and shine a flashlight down there and look). I'd do that before removing and cleaning the tank, it might not be that bad.

I ran three of those aftermarket, clear NAPA fuel filters before I stopped seeing red, clay colored crud in it. Also had to blow out the needle valve to clear it from stuff a few times.

It sucks when you are driving along and the thing just stops. Been there.

 

I realize your trying to help but I do know what im talking about when it comes to this specific truck. We rebuilt the engine last summer it was stroked to a 390 has a mild cam and an edlebrock carb. Obviously its been replaced because these trucks also didnt come with 4 barrels (im sure you know that). We mad all the changes that are not stock. When we got this truck in 2006, the only thing that was not completely stock about it was the tires. Everything else was stock and mostely original. Second. I meantiond I worked the throttle while looking down the car and NO FUEL squirted out at all. That is how I know its a fuel problem. I dont normally take guesses when diagnosing a problem because it is not rocket science.

 

And forgive my spelling im on a phone and I dont have spell check or a lot of time at the moment to proof read

 

Sounds like you have some really good history with the truck and that surely helps when trying to figure out a problem. Could be that taking the gas tank out and cleaning it out might be the solution. On my 66 when I take a sharp corner turning I can hear not only the float banging around but lots of scale and rust sliding around in the bottom of the tank and have been surprised that my pickup tube has not plugged off on the suction end in the tank and shut me down. Going to restore her one of these days.

You are 100% on the mark that the folks here are just trying to help and cover all of the possibilities. I don't post very much here but visit here fairly often and really enjoy all of the different ideas everyone has when trying to help someone try to fix a problem.

wtxbadger
1966 F100 Custom Cab
352 V8, 3 spd Column shift
All original and still going strong.

wtxbadger