I have a 1988 toyota 4runner with a rebuilt fuel injected 22re. It runs great except when it rains. The motor bogs down and acts as if it is not getting fuel. If you step on the gas it will rev high then low over and over again. Anybody have any ideas? again, this only happens when it rains.

 

Check out the body ground. Make sure its clean.

 

some how water it getting in ur clutch threw the bottom plate of ur tranny and making ur clutch slip causing the motor to rev untill it catches again ...my truck dose that alittle after riding threw deep water