Chainsaw Repair

Since points and condensers weren't available for my saw I installed one of these modules. Had been running fine for years but for some reason it will no longer idle. Anyone heard of a EM causing this? Doesn't make sense to me but I've had the carb apart several times, cleaning it with 2+2 gum cutter and blowing it out, soaked it in hot water, very hot, blew it out, and pulled the fuel filter out of the tank to make sure there were no problems there. It does run on part throttle and goes like Hello on full throttle. All gaskets and seals look good. Wish I had another carb to try, but I don't. Any suggestions?
Thanks in advance for any help, Bill