1st Generation Specific (1979-1985) 1979-1985 Discussion including performance modifications and technical support sections

Tachometer Quit Working

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Old 12-31-23, 03:35 PM
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Tachometer Quit Working

Hi all,

Trying to get everything dialed in, just finished a rebuild on my '82 RX-7 and while I had it running (sort of) the tachometer suddenly quit working.
Anyone know where I can start diagnosing what might have gone wrong?
Old 12-31-23, 04:30 PM
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First see if you have trailing spark, tach gets its signal from there.
No trailing spark is usually a blown ignitor.
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Old 01-01-24, 06:28 AM
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Last edited by ATC529R; 01-02-24 at 05:59 AM.
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