Kurt: Sorry to take so long to reply; looks like other members may have answered your question on why the potting material melts. I have removed the EFI support plate and used three cans of carb cleaner to remove the potting material from plate and throttle body. Both now glisten. I decided to do everything else I can now, because it's such a hassle to get the plate out. With the plate gone, you can get at the EGR valve. I took it out and reamed out the carbon using a vacuum cleaner to suck up all the little black pieces. I replaced the valve just so I wouldn't have to think about it again. I also pulled the valve covers and painted them, cleaned up the intake manifold and painted it, put on new valve cover gaskets. For the heck of it, I also replaced the temp sending unit because it's cheap to replace and impossible to get at without taking everything apart. While I'm at it I'm also replacing most of the hoses, too, especially the fuel lines leading to the plate. I replaced the spacer assembly with one from my local Chrysler dealer. Cost was $22.00 and it's in stock in Detroit. I absolutely replaced the foam gasket between the plate and throttle body. There is no way to remove this gasket in one piece and reuse, but it's critical to avoid air leaks. I got mine from Brad's NOS Parts (on the web) for about $13. Let me know if you want part numbers.
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