I have a strange problem with my 1990 Mazda Protege (323 - 1.8L DOHC) - the car starts up fine on a dry and sunny day but it will not start on a rainy day or if it has rained hard the previous day and there is some moisture in the air and on the windshield.

It cranks but it will not starton these kind of days buton a sunny day it will start right up like nothing is wrong with it. I had the battery amps checked and eventhough the battery is 4 years old, it iscranking out the right amps andso that can be ruled out as the problem.

One of my coworker is telling me that this is due to some moisture issues and I need to replace the rotor and rotor cap....does any one else have this issue? What could be the problem here?

Please help!