I have a 91 Accord LX that has just over 100K mi. The strangest thing happened this morning on the fwy...All of a sudden the the speedometer needle started bouncing, and then went to 0. Then it came back to life was indicating my speed accurately. Then the seat belt light came on, and then went off, but the car was running fine.

At lunch time I went to start the car and it fires right up to idle and immediately died. It did this 2-3 times before starting and idling smoothly, although a little low.

Leaving work today, the same symptoms appeared, only this time it was more difficult to start and and keep running. It fires right up and dies immediately. It took about 10 tries to start before it would idle without dying.

I do not believe it to be fuel related because it ran fine at lunch time with no fuel starvation issues, and it ran all the way home with no running issues.
I believe it to be something electrical (ECM, relay, related) but cannot imagine where to start. Any ideas or suggestions from the gurus would be greatly appreciated

P.S. Last week I removed the rotor cap and rotor to clean the contacts, could this have any bearing on the problem?

Someone suggested it may be the VSS Vehicle Speed Sensor, located on the transmission, but my main concern is not the speedo needle bouncing, it the fact that the car will not reliably start and run.

Thanks in advance for any help offered.

 

I don't recall if your vintage uses a locking screw on the rotor or a keyed shaft, but if it's a screw type, make sure it didn't come lose.

You might have a failing ignition switch. There was a recall for many '90's era Hondas for that.

Or, might be be the coil/ignitor failing.