there can be any number of problems why...first off, why did it quit? was it in storage...starter works, ignition can be tested by pulling a plug or have someone check between the end of the spark-plug wire and ground (such as the spring mount bolt) with a screwdriver...if there is a spark, check fuel pressure at the fuel rail~ which is like a little bicycle tire valve (shroeder valve) which should spray gasoline if there is pressure... next turn the crank to TDC and look at the position of the valves...there ought to be a markation or scratch on the end of the camshaft~ check all that and report back~
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