Did you just make that up?akirarex said:in the tach assembly there are 4 coils for this.
The VSS outputs 4 pulses per revolution of the speedo cable. The tachometer reads 1 rpm per every 2 pulses per minute... For example, 2000 pulses per minute would indicate 1000 rpm.
My guess would be that the tachometer is simply wearing out. They're fairly easy to swap from any '88-91 Civic (the ones that have a tach anyway) or CRX.