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When there is a problem starting or driving a vehicle, two of the most important checks involve the ignition and the fuel systems. The 2 questions most mechanics attempt to answer first, "is there spark-'' and "is there fuel-'' will often lead to solving most basic problems. For ignition system diagnosis and testing, please refer to Chapter 2 of this manual. If the ignition system checks out (there is spark), then you must determine if fuel system is operating properly (is there fuel-).

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