In "humid weather" the engine runs rough, check engine light comes on. The code indicates a problem with the Mass air flow sensor. Bought some MAF cleaner took it out and cleaned it and it seemed to work for around 6 months and now it's back to the same thing. I installed all new Ignition wires but that didn't seem to help at all.

Update from Nov 18, 2010: My problem was a bad distributor cap… more specifically that cute little black thingy right in the center of the cap that makes electrical contact with the rotor was cracked/broken. I had looked at this before but the last time I looked at this, that part fell off in my hand. No choice but to replace it and the car has worked great ever since.