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Ignition timing

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Old 03-05-2021, 08:43 PM
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Ignition timing
https://www.eriecountyohiohistory.com/west-house/Anyone know exactly how these Ecotecs with VVT know where in the cycle the crank is for the purpose of spark timing? Sure, there’s a crank sensor but does it figure out if it’s on the compression or exhaust stroke? From the cam sensors? Seems like that would take a few milliseconds and delay starting.
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Old 03-06-2021, 06:19 AM
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The camshaft and crankshaft sensors
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Old 03-06-2021, 11:52 AM
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OK, thanks!
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Old 03-06-2021, 12:06 PM
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If you look at the intake camshaft the driver’s side end of it has webs to trigger the camshaft position sensors
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