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I've been dealing with a rough idle for about 2 years now. When the truck is cold, the truck idle's silky smooth. When the truck gets up to operating temperature the idle becomes rough. I've maintained the motor meticulously and tried a few different tunes to see if maybe that was the cause...

Ditto to the guy's that recommend Cobra units. I've had 2 and the only reason I bought the second was to upgrade. Never had any problems with them, but whatever you go with I'd buy the cable to hard-wire it in to avoid the power port on the unit getting loose from the coil-y cigarette light...