Here's the post asking for help:
>A couple of weeks back I posted a request for Help with an ignition
>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. <end>
Here's the source and solution:
Most of the replys were pointing toward the spark plug wires or boots
(pin holes or carbon tracked. Three mentions of dialectric grease and
one suggestion that maybe a bad brain box.
The wires and boots seemed in good shape and I had never heard of
dialectric grease, (wasn't used on the original boots). Turns out that
moisture around a couple of the boots *was*
the problem. The source of
the moisture was a leak around the thermostat housing. If I accelerated
fairly hard it would flood the two plugs right behind the thermostat.
Whenever it missed I would wait for it to cool down before checking it
out and by that time it was dry enough not to catch attention. Replaced
the O-ring and cleaned up the housing but still had to add a bit of
silicone to completely reseal the housing. Pretty crappy design IMO.
Thanks again to all who replied. One to file away?