2nd Generation Specific (1986-1992) 1986-1992 Discussion including performance modifications and technical support sections.

Tach signal, and flooding Q.

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Old Mar 4, 2005 | 12:10 PM
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Tach signal, and flooding Q.

Where does the Tach get its signal from? CAS? And does flooding affect that signal?

I'm asking because I have a GXL that floods, however whenever it floods the Tach simply stops moving. I can tell if it will flood or not the instant I start cranking it over by seeing if the Tach needle bounces or not.
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Old Mar 4, 2005 | 01:17 PM
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I beleive it gets it from both leading and trailling coils.
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Old Mar 4, 2005 | 01:27 PM
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Tach signal comes from a summed signal of the trailing coils.

Nothing to do with the leading coils...

chances are that if you have no tach, you have no trailing coils firing.

Last edited by Icemark; Mar 4, 2005 at 01:31 PM.
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Old Mar 5, 2005 | 10:36 AM
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Would trailing's not firing prevent startup? I can't see how they would...
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Old Mar 5, 2005 | 10:41 AM
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plugs maybe?
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Old Mar 5, 2005 | 10:44 AM
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Also I forgot to mention, that when this happens, roll starting it seems to work most of the time?
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