The TC had a rubber “engine compartment seal” that went on the forward lip of the engine compartment under the rear window - basically their version of JB’s aluminum angle. I didn’t appreciate its purpose and because I thought it contributed to my engine cover not fitting as flat as it should, I took it out.
A few weeks I took my car to a Hagerty car show at a vintage race near by. Before going, I washed and waxed my car, of course. She ran well on the hour and a half drive to the track but when it was time for us to cue up for our parade laps on the track, she started to run really rough. It would occasionally clear up but on the drive home it never did.
When I got home, I pulled the plugs to see if they gave me a clue about what was wrong. Everything looked good till I pulled the plug wire for #1 (the BDA has its plugs in a well and there is a rubber cover on the wire) and the connector was obviously in about three quarters of an inch of water. There was my problem!
Apparently, water came in the front of the engine cover and ran into the well of the #1 spark plug. I now have a heightened appreciation for JB’s angle and that seal!