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In 2007, Shanghai Volkswagen Passat controls 1.8T automatic car with a mileage of about 130 thousand K, equipped with BGC engine and 01V automatic transmission. User response: the car will speed up at 80~100 km/h. Inspection and analysis: the maintenance personnel detected the engine control unit and found 2 cylinder ignition failure indication. Connection fault diagnosis instrument road test, no abnormalities during normal driving. When the speed of the 4 block speed is about 50 km/h, the acceleration phenomenon appears obviously. A quick look at the engine control unit data shows that the 15 group of 2 areas shows that the number of 2 cylinders is 34.