1985 MM 2.6L 5 Spd, all stock. I've got what might be an unusual issue. When I start the truck up in the morning (usually cold out) it will fire up and then start pulsing until it gets warm. What's unusual is sometimes I can hear it run fine for one second after it starts and then it does the pulsing until it's warm. In the afternoon, I don't usually have the same issue. Am I incorrect in thinking there's a temperature sensor somewhere that could be contributing to this? Or is it perhaps a sticky choke? I believe I'm selling this one soon and I'd like to get it all fixed up.
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