well this is my problem, my car is running and just sitting in my drive way and on the rpm guage the idle is at zero. i take it for a drive and the guage works but it seems to be off by a thousand rpm's. i think my v-tec usually hits at 5000 or 5500 rpm's but right now it hits like around 6500 and i'm not sure what it is but i dont want to start taking stuff apart before i get some opinions. the car is running perfectly fine but i dont know whats up with the rpm. its a 91 crx, gsr obd1 motor.
i would appreciate any help.

Eddie