1986 TOYOTA MR2 Equipment Problems

I OWN AN 1986 TOYOTA MR2 WITH A 4 AGE ENGINE AND MANUAL TRANSMISSION. I WAS DRIVING AROUND THE NEIGHBORHOOD WHEN I APPROACHED A NEIGHBORHOOD INTERSECTION. THE ENGINE STARTED TO "REV" REALLY HIGH AND I PUT THE CAR INTO NEUTRAL. I SAT AT THE INTERSECTION FOR A WHILE TRYING TO FIND OUT WHAT THE PROBLEM WAS. THIS WAS THE FIRST AND ONLY TIME IT HAS HAPPENED TO ME. SO I STARTED TO JIGGLE THE LIMP GAS PEDAL. SOON AFTER I LOOKED IN THE ENGINE BAY AND HAD SEEN THAT A RUBBER PIECE WAS JAMMED UNDER THE THROTTLE LINKAGE. THE PIECE OF RUBBER WAS A CAP TO PREVENT WATER FROM GOING INTO AND RUINING THE THROTTLE LINKAGE. I DROVE HOME AND LATER ON WENT TO A SPECIALIST THAT TOLD ME TO REMOVE THE RUBBER PIECE FROM LETTING THAT HAPPEN TO ME. I HOPE THIS INFORMATION CAN HELP, MAYBE THE NEWER TOYOTAS...