This was the simple fix for my rough running Bronco.
After it would heat up, it would start idling strangely. The idle would go up, then down, then up, then down, then shut the truck off. It would restart a couple of times, doing the same thing. But then wouldn't start at all. Had to completely let the truck cool down (overnight), and it would start up again. Then when it get's to operating temperature, it would start doing the same thing.
If your vehicle is doing the same thing, it's probably this part. Inexpensive fix. Just need to buy the right tool, and some dielectric grease to install it.
Made and designed to correct the OEM Ford flaws.
Comes with the heat sink paste.
Works perfectly.
Old 87 ford that I have owned since new is running great again.