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The Insight engine employs a direct ignition system similar to those used on the Honda S2000 and the 1999 Odyssey. Separate ignition coils for each cylinder are located directly above the spark plugs.
Two TDC (Top Dead Center) sensors are mounted at the rear of the single camshaft. A Crankshaft Fluctuation Sensor (CKF) is located near the bottom of the timing cover where it generates a signal as the crankshaft timing chain sprocket rotates past it. These sensors establish ignition and fuel injection timing, and monitor crankshaft speed variation.