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Fuel Timing Calibrator

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The secret to keeping the "check-engine" demon at bay is this fuel/timing calibrator from Split Second (FTC1-019B). It is included in the kit, and 505 loads it with a fuel map that will get 99.9% of us going right off the bat. Even our YJ, with a bored-out TJ throttle body, custom 21/2-inch exhaust, high-flow cat, and worn-out cap and rotor ran like a champ with the off-the shelf fuel map. Of course, with the included software, you can go in and change the fuel map as you see fit, but be careful about leaning it out or richening it up too much as you could damage the engine.