I drove a friend's early touring car to a show yesterday. I think I had some vapor lock issues. Besides crap gas, could the shroud cause more problems with cooling the gas line. It seems that Ford abandoned the shroud early on.
It's not likely. The shroud was discontinued to save money, it wasn't needed for cooling. A's seldom vapor lock, so something else was probably happening--like terrible gas, or maybe a radiator cap on the gas tank? (radiator cap isn't vented, the gas cap is) It's easy to mix them up!
Did you adjust the fuel mixture? Bud.
Google "fordbarn; model a vapor lock"
I know the gas and radiator weren't reversed because I had driven about 25 miles. Also, the cap is one of those motometer cars.
I did adjust the fuel mixture to no avail. I've experienced vapor lock one time years ago. But the outside temp was 105. Using Shell gas which at that time was ethanol free solved the problem. Yesterday was a beautiful cool day here in Indiana.
I'll check the Fordbarn.
If you have issues with it dying when hot and then restarting when cold, a failing coil can mimic what is often thought to be a vapor lock problem. I drove mine daily over a two year period in the sweltering south and never experienced failure from lack of fuel due to heat.
I don't think it is vapor lock. I have had Model A's and found that a clog in the fuel line caused the car to run as if it is out of gas. This happens especially at high speeds or when pulling a hill. It can also be caused if you are using a fuel filter instead of the original type sediment bulb. The filter blocks the flow and causes the problem.
On occasion on my 28 A I have what seems like vapor lock after driving about 25 miles. I found that if I loosen up the plug on the carburetor you can hear what sounds like air escaping. I tighten the plug back up and its fine again. At first I thought it was a plugged gas cap, but I ran it with no gas cap and it still happened. More than likely something in the carburetor, but hasn't worried enough to take the time to do anything with it. If it happens I just loosen the plug and it is okay.
Agree with Norman. So many Model A's have rusty gas tanks and thus fuel delivery issues ranging from clogged fuel line to crud filled carburetors. People will try anything to avoid the inevitable- pull the tank, have it professionally cleaned, and then paint it.