Honda Car Forum

Tachometer spikes and is erratic while driving. Can clean out the distributor posts and rotor and seems to calm it down somewhat.

to clean out the distributor posts and rotor and seems to calm it down somewhat















that may need to be done again or















maybe go to junk yard to buy the part and put it in again may work better

the answer lies in the ignition coil. the ignition coil builds and discharges the current of electricity to fire the spark plugs. Your tachometer is reading the number of times the coil discharges and converts that into engine RPM.































if the coil is breaking down internally then the signal to the tachometer is erratic and the needle starts to jump. its a sign that the coil is about to fail. When that happens it will start as an engine misfire and lead to stalling and quickly to a no start.































replace the ignition coil and your tachometer should work properly.































hope that helps

This model is known for excessive rust and corrosion build-up inside the distributor. Remove the cap and see if there's a brown rust colored build-up. If so replace the distributor and your problem will be cured. good luck