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What is the strangest thing that has caused you a wrinkled brow while driving your Healey? It may have been today for me. While returning from a picnic at a local winery, on the freeway, there was an engine misfire that was very brief but soon happened a second time. During the second event I noticed the GPS speedometer cycling the needle as it does when you turn on the ignition. In between these burps, which came and went infrequently enough so that I kept driving as oil pressure, voltage, engine sound and everything else was normal. I couldn't see an rpm change or voltage change when it happened, it was too quick. It continued for about 15 minutes until I stopped at home. I figured it had to be ignition related but it turned out to not be anything I was thinking.
I was able to suss it out without getting out of the car. Turns out the ignition switch was the culprit. My key chain has a Healey leather fob and an aluminum capsule that holds my ear plugs...a bit of extra weight. Previously I'd done some behind the panel work and when all was done I noticed the ignition switch had rotated slightly in a clockwise direction but didn't take the time to reposition it. I sat there and turned on the ignition and all I had to do was touch the key and it went from on to off. It was right on the feather edge. The weight of the fob etc. was enough to make my 67 year old switch turn itself off from a rough spot in the road. Had the "on" position been with a vertical key slot, as it previously was, it might not have manifested. I guess I'm lucky it spent most of the time in the on position. Test drive all good. New switch is on the xmas list. Of course, I could put a counter weight on the key........
I was able to suss it out without getting out of the car. Turns out the ignition switch was the culprit. My key chain has a Healey leather fob and an aluminum capsule that holds my ear plugs...a bit of extra weight. Previously I'd done some behind the panel work and when all was done I noticed the ignition switch had rotated slightly in a clockwise direction but didn't take the time to reposition it. I sat there and turned on the ignition and all I had to do was touch the key and it went from on to off. It was right on the feather edge. The weight of the fob etc. was enough to make my 67 year old switch turn itself off from a rough spot in the road. Had the "on" position been with a vertical key slot, as it previously was, it might not have manifested. I guess I'm lucky it spent most of the time in the on position. Test drive all good. New switch is on the xmas list. Of course, I could put a counter weight on the key........