Does someone ever had a Optispark with humidity? I bought a 1994 LT1 It had the dirtiest engine bay , so I cleaned it... later I went to start the car for about 2 minutes only...and shut it off... next week when I turned on the car didn't started, with many backfires it was almost imposible to stay on.. took it to the mechanic and after many times, It started.. He decided to let it warm for about 30 minutes.. and suddenly the car isn't havin problems and no back fires

 

Opti probally got wet then dried out. Next time cover it up with a bag. Befor I put some sealer on mine I could drive through a puddel of water and it would do the same thing.