What gives? so I come home, to talk to my roomate, who also has a 92 civic plenumpowered ride, his being the 4dr which I'm sure you already knew. Anyways, his idle was going crazy like no one has ever witnessed in time. Anyways, the car just sits there, all by it's lonesome while the motor revs up and down. It revs up to about 3500 and then drops to about 500, only to be repeated in a cyclical fashion. What gives friends?