Triumph Repair: Follow up on wet plug question, leaded fuel, showroom floor

Question
Hi Howard
Really appreciate the quick response. Big thx for heading me in the right direction. As usual (you'd think after 40+ years of messing with cars.....),I missed the obvious which
you caught. Bad plug. I had originally checked spark with a spare plug and not the one in the engine. Checked compression and all were fine (whew).Purrs like a 50 year old kitten. Thanks again!!

Answer
Your welcome David, The reason I put that plug in there is because that very same thing caught me about a month ago on my series III Jag. I had a miss and did all the normal tests and just looked at my plugs and they all looked good. (back when we had leaded fuel I use to be good at reading plugs) So I bypassed the plugs and finally stopped by a friend's shop who had a scope since I use to be pretty good at reading a scope when I worked for dealers. It picked it up right away and switching wires didn't correct the obvious miss on screen but switching plugs did. DUH!

I started working on Jaguar in dealerships when the XK-150 was still on the showroom floor and I missed a bad plug on my own car. Ha! I guess it IS true. Stuff happens. Even when we are suppose to know it all.
A friend mechanic once said. "You know! I don't know it all, but I almost do."
Howard