My Road King with EFI is running like crap when I reach areas of humidity. She's accelerates rough, and feels lets out frequent hissing sounds from the air intake when I pass lakes. She's been doing it for a couple weeks, but I wasn't able to determine the problem until tonight, when the cold air was nice and dry, but became slightly humid when I passed lakes. I initially tried changing out the engine temp sensor, because she had problems like this last year, and that ended up being the problem, but it made no difference. I have NOT touched the barometric pressure sensor. Any suggestions on what else could cause this problem?