When I first bought my 86 it had identical "symptoms".  When driving in the
rain it was OK until I stopped.  Then it would not come off idle.

I lightly sprayed the inside on the distributor cap with WD40 and then
lightly sprayed every connection I could see.

That was several years and many parts ago, but it did solve the problem.

Randy Herd
86 GL Weekender
68 Kombi
98 Jeep Cherokee

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