So yea, I have a ej20g in a 99 2.5rs and every time it rains my car wont run. It will start and sputter at WOT to about 4,000rpm then its fine. If I let it dry out a day it will run fine. I have sprayed cleaner in all the wiring harnness plugs to include Maf. I have checked to make sure nothing was riding down into were the ecu sits. I know it could be anything, It just starting to piss me off, and I want to get this solved. So if any of you have had similar problems or might have an idea, please chime in.

thanks

Its not a bad Idea to put dielectric grease in all your connectors. If you think something is wet spray WD-40 in or on it and it will temporarily displace the water.