k i just replaced my 87 samurai with a weber 32/36. ran great and everything after i adjusted idle and mixture. ran great for a few weeks. then it rained like crazy and i played in some deep mud. now when its cold it wont idle, and lopes. runs really rough. if you rev it past 3k it purs like a kitten, but anything under it loped and jumps, then dies after a min. once its hot, it will idle up fine. no matter what the idle is at it will do this when its cold. not sure on this one. thinking valves, mybe sucked some water in or something. checked the distrib. its dry, and all plugs and wires are good so idk. any help would be grea.

dont know where u live, but I have heard some people with webers having the same problems or similar problems in cold weather.  I have the same weber you do on my sammy here in minnesota with no problems.   Check to see if the carbs nutz came loose and u have a small vac leak,  also try running some seafoam in the gas tank, and some thru the carb.. you might have some buildup in there...  also with some carb cleaner spray down all the linkages real good on the outside.

other than that I cant think of much more at the moment

Heres a link to a weber carb tuning page
Found it on acksfaq.com maybe this will help.

http://www.izook.com/tech/samurai/engine/weber/weber.htm

Amilla

did the plug wires get wet?

not summerged no but im sure they did, alot of things got splashed and stuff

i had a problem very similar to that.i bought cheap wires and when water got on them the problems started, i went to a better brand and fixed the problem.