2001 Mazda 626

I hear a high pitched noise only when i accelerate, and the belts are fine. If i tap repeatidly on the gas it sounds like a churping noise. can compression be a problem, cause I wound up spraying some engine degreaser on the engine the other day and the engine itself caught on fire, so i sprayed it with water and wound up getting water down inside where the spark plugs are. that dryed out and the car runs alright now, just got the noise left over