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Is the check engine light on?
Are there any codes in the computer?
Ok, no problem.
YES, as long as the computer is awake and working properly when this happens, the most likley cause of a no spark condition on this vehicle is a faulty camshaft position sensor or crankshaft position sensor.
Both of these sensors can go bad intermittantly causing this no start only under certain tempatures or "conditions"
The cam sensor is inside the distributor
The distributor is driven by the camshaft..
You can use a lab scope or a voltmeter to check the voltage on the signal wire while the engine is rotating over.
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