hello everyone.

i have a 93 240 sx se. great car, except when wet.
When it rains or gets very damp my car will start to stumble when i push the on the gas. sometimes just barley pushing on the gas will cause backfires and major stumble, sometimes I only feel it under heavy acceleration. last time it almost would not start at all.
when the weather is warm the car runs great.
i did a complete tune up, plugs, wires, cap, everything i could think of. still does the same thing.
i think it might be the mass air meter but at a couple hunded bucks i want to be sure before i replace it.
i get no error codes or check engine light.
any suggestions?
thanx

 

do u warm up the engine b4 u start driving? i mean like, do u see the temp going up. iono 4 sure, just a thought.

 

it behaves the same hot, warm or cold.
maybe it gets worse as it gets warmer, but not much difference.