Alright, so about a month ago I had to replace the Ignition Coil on my car. (https://www.honda-acura.net/forums/s...d.php?t=271432)

It was right after I had cleaned up all the connections under the distributor cap - I started the car, it idled for 30 seconds, then died and wouldn't restart.

I checked for spark and there was none and after checking the resistance of the coil found it was bad.
Put a new coil in and the car runs as before.

Not once since I put the new coil in has the tachometer acted up like it had been.

Just to refresh, it would sometimes work fine but others it would read off by 500-1000rpm and I later found that when it wasn't reading correctly I could floor the car, getting the revs up, and the tach needle would jump around a bit and then read correctly for at least a little while after I did this.

Whether or not the new coil alone is what fixed the tach problem I can't say for sure as I also cleaned up all the connections under the cap including the cap itself, the rotor, and on the ignitor.

During the first couple weeks I noticed the tach would still sometimes read about 200rpm over what the engine was actually doing (I've memorized idle & rpm @ certain speeds depending on gear) but the car has done this on and off since I first got it - my guess would be the ignitor may need to be replaced at some point but I plan to purchase a dizzy/ignitor combo if it goes out so I'll wait and see.

Interestingly, I haven't noticed the 200rpm inaccuracy the last couple weeks - I've read fouled plugs/bad wires b/c of higher resistance can over-work the coil and cause it to fail sooner so maybe my plugs have cleared up and are no longer causing the faulty readings :hsdunno: Just a guess.


Anyway, hope that helps someone