I have a perplexing problem with my '99 Honda Accord. A couple months back, I noticed the Immobilizer System Indicator light would come on while I was driving. After 15 minutes or so it would go off. This happened about two or three times.
Then, about a day or two later, while driving at a steady speed on the highway, all the dash lights shut off, the speedometer dial went to zero, I believe the radio also shut off, and at the same time, it felt as though a giant had grabbed my back bumper and held it for a split second. It felt as though I had very lightly tapped on the break and let go immediately. After only a moment, all lights, etc. returned to normal.
The shutting-down-on-the-highway thing has been going on now ever since. But now, there is an additional problem. When I come to a stop (usually after having been on the highway) occasionally the car stalls. It has always been very easy to restart immediately, although sometimes there electrical ticking sounds, like the sound made when someone is putting jumper cables on a battery.
Last but not least, this week after a stall at a stop light, I started the engine back up and it seemed as though the gas was sputtering for a few seconds. Also, a new indicator light came on - the Malfunction Indicator Lamp. It has remained on ever since. I could swear that there was also a smell, something like antifreeze? But the car did start and is operating normally.
I finally took the car to a mechanic, who believes it's a relay of some sort, but he doesn't know how to isolate which relay it is.
Anyone else out there have any ideas on what to do to fix these problems? Any ideas would be extremely appreciated!