1986 Jeep CJ7 Stalling while driving

Hi, I have a 1986 jeep cj7. I bought it 5 years ago and am trying to get it going again after sitting for about 3 years. I changed the fuel filter, plugs, wires, changed the fluids, battery. It starts and runs great up until it heats up (gets to operating temp) Once it hits a certain temperature while driving, it starts to sputter, gag and eventually stalls out. I have to pull over and let it cool down. Once it cools down, it starts fine until it reaches the temperature again and it stalls out again. I replaced the carb in it with the same one that was in there. It was/is an Autoline c6213 carb. I noticed that there was no electrical going to the stepper motor on this carb so not sure if the previous owner wired it differently so you can bypass the stepper motor. I do notice that when it is started the metering pins do not move and once it reaches operating temperature, the pin still remains the same.

A couple things to note. The jeep will idle at operating temperature forever. It doesn't miss a beat until you get driving it for a few minutes and then it starts to stall. After making it back from the road and is hot, it will still remain idling without any problems. I have looked for vacuum leaks and everything seems okay. I have not changed the vacuum lines as of yet. When I bought this jeep it ran great for 2 straight summers and I have not done anything different to the jeep. Any direction would be appreciated as I am learning about the 4.2 L I am not sure all that has been modified as some electrical and some vacuum lines seem to be plugged etc.

A couple questions:

1.) Should I replace the carb again but use the model Autoline c6214? This model does not have the stepper motor.

2.) On this new carb there was not a linkage to hook up the Manual choke. I will not be driving this jeep in the winter so do I need to have a manual choke?

3.)Could a bad fuel pump be the cause of this problem?

4.) Any direction would be grateful I really want to get my jeep roadworthy again. Thanks so much for your time. This site is awesome.


Joel