when its been raining or just after ive washed the car the car doesnt run too smooth especially on idel and at low revs when off boost.It feels lumpy and shit but when comes on boost evrythings all ok,in the dry the car runs sweet.

so ive come to the conclusion that water is obviously going thro the vents into the engine and something is getting wet any ideal what ?? proberly a sensor or something anone got any ideals why this is happening and causing these running problems only when wet??

Thanks for any help.