What gap on plugs?
I was gonna install a wet TNT set-up years ago on my current 427ci so I bought some TR6's. For some reason TR6 plugs will not work in my engine. The engine spits, backfires, stalls and runs like hell. Simply cannot even drive away with the car, its that bad.
Pulled them out and put TR55's in and everything was perfect. Real strange. Same thing with Bosch 02 sensors with my engine, the engine will not run.
If you've seen one PCM, you've only seen one PCM....they are all NOT the same in how they operate.

