eagle cold wx run

I have a 1988 eagle 4.2 ltr engine when the engine is running and still has not reached normal temperature stops running ,start it up again and does the same thing , now it only does it in gear ,at an cold idle is ok ,once it warms up everything is normal ,could i have a bad vacuum switch bad or computer ?by the way all hoses emissions are still factory ,new,carb, dist cap,rotor plugs, and most vac switches.

choke is working ok but I forgot about the intake heater ,i will check it out  thanks  jim

You might want to replace ALL the vacuum lines if they have been under the hood since 1988. The hoses get hard and don't seal on the various nipples very well, causing minute leaks that are hard to find, and usually result in odd running. One of the CTO valves could be stuck in position also. They screw into the block and will have three or more vacuum lines. There purpose is to switch vacuum once the engine is warm, they extend into the water jacket. When cold vacuum is routed one way, when warm another. They can stick in either position.

I hate to say it, but it's a good idea to replace ALL the controls you can get replacements for. Face it -- they are 30 years old now -- they have exceeded their life expectancy. Not a "bad design" or "poor engineering" on AMCs part...