toyota corona 1986 st141 150k on it someone said it could be a filter,modulator, or the tv cable i dont think its the tranny cause it was having trouble getting into the top gear and i had to play with the throttle to get it to go into top gear but once in top gear it whent just fine. also i noticed when it whent bad i can hear this airy whistling noise somewhere near the engine could that be a bad modulator?