Ignition problem 1982 4G52

[StarquestMan]

I noticed the fuel cut and ball vent valves on the diagram as well. the vacuum device in question is shown on the diagram as having a coil inside it like the ball vent valve and fuel cut valve. I think the reason that there is only one vacuum line going too it is that it just releases external air into the vacuum line.

[StarquestMan]

I studied the pictures of that little device and im betting that cylindrical portion of that solenoid that is towards the engine side of the vacuum port is a mini cotton filter to allow air in. kinda like the one found on the 4 port thermo valves found on later trucks. I know the 2 port vacuum valve for the AC idle up on my 87 has a little filter too to let air back into the throttle opener when the AC cycles off to let the throttle opener release.

[StarquestMan]

I think I may have found the part number, MD006209. all the websites only go back to 84 but that should be it. it's number 18 in the diagram here https://www.moparpartsgiant.com/part...gr-system.html