When's the last time you replaced your spark plug wires? And with what brand? 95% of the time a module fails, it's because of bad wires. I've had my replacement TFI on for over a year. I replaced the wires at the same time, too, and haven't had a problem since.
...on the other hand, if the exhaust is blasting right onto the module, that's an entirely different story there.
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Capri306, Moderator, The Mustang Works Online
"PROUD TO BE AN AMERICAN!!!"