Hard start when warm
The only way to eliminate the start problem from fuel is a return system. Fuel filter form a late 80's car or truck with a return . But you will have to run a return to the tank on a 72 use your vent line coming up to your charcoal canister . You can also T the line at the carb bit you will have to ad a return regulator and line to the tank.
I had the same problem with my duster with a electric pump I was able to shut the fuel on and off until the boiling fuel would be used up and the floats would work. That is what is happening the floats won't shut the fuel off until cool fuel comes in. Because the fuel is dead ended at the carb with no return it takes a while and the motor floods.
I then added a return with a regulator after the carb instead of ahead of it. Big difference in the car all around. The boiling fuel is not only in the carb it is in the lines also. Note the regulators for the return look exactly the same as the regulators for before the carb. You need a return regulator to do this.
I added pics of my system before and after. My return system is expensive but there are other ways to do the same thing such as a filter from the 80's as stated. Good luck it took me a while to figure out what the heck was going on on my car.
The only way to eliminate the start problem from fuel is a return system. Fuel filter form a late 80's car or truck with a return . But you will have to run a return to the tank on a 72 use your vent line coming up to your charcoal canister . You can also T the line at the carb bit you will have to ad a return regulator and line to the tank.
I had the same problem with my duster with a electric pump I was able to shut the fuel on and off until the boiling fuel would be used up and the floats would work. That is what is happening the floats won't shut the fuel off until cool fuel comes in. Because the fuel is dead ended at the carb with no return it takes a while and the motor floods.
I then added a return with a regulator after the carb instead of ahead of it. Big difference in the car all around. The boiling fuel is not only in the carb it is in the lines also. Note the regulators for the return look exactly the same as the regulators for before the carb. You need a return regulator to do this.
I added pics of my system before and after. My return system is expensive but there are other ways to do the same thing such as a filter from the 80's as stated. Good luck it took me a while to figure out what the heck was going on on my car.
