Hey guys, i have a 1985 Rx7 GS and its been having trouble. i think it is a vacuum leak but need a second view. it will not idle below 1200 rpm but when i shift into drive it goes to the right rpm. when i am driving first gear feels fine but anything after that is wrong. around 3000 rpm in second it will loose all throttle response and stop accelerating. when i stop after that the car will shut off. any ideas?