A couple of weeks back I posted a request for Help with an ignition problem. Out of the blue, my T-Bird just started missing like crazy. One minute it was running fine, the next it was missing and popping with the service engine light blinking.
I replaced one coil and that did nothing. Bought another coil and a set of plugs. Installed the plugs and viola! it ran like a top again. General consensus was it was the brand of plugs (Bosch Platinum) that caused the problem. The Bosch plugs had few miles on them and looked fine. In spite of the fact the replacing them fixed the problem I always had this funny feeling about the whole thing.
Friday it started missing again. I was stumped. The only thing I could think of was to open the hood at night and check for a light show. Did that,...nothing.
OK, I thought, maybe one cylinder is somehow killing a plug or something. I loosened the boot around the 5 plugs I could get at easily and started it up. One at a time, I pulled the plug wires up and away from the plug until I could hear the spark arcing and notice the miss. I did this with all 5 of the plugs. Then I shut it off and pushed the boots back down into place and...... viola! it runs perfect again.
Gotta be some education here. Whats say you experts? Computer malfunction? Other coil?
Frank