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Q: Car won't start

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The motor turns over but will not start.

Hello. If the engine suddenly died while you were driving then it is typically caused by a bad fuel pump. It can also be caused by a bad ignition coil or a crank sensor. Most of the time it is the pump. A mechanic would diagnose this by testing for fuel pressure and seeing if the engine has spark. If it is missing either of these then further diagnosis is done. You can also listen for a buzzing from the fuel pump when the key is first turned on. If there is no noise then that is a good sign that the pump is bad and needs to be replaced.

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