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06-18-06, 09:17 PM

jwccgc

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jwc

Any idea what causes voltage spikes, tach jumps irratically on my 79 rx7

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06-18-06, 09:58 PM

64mgb

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Bad distributor. Either replace the base plate that the points ride on, or convert to an FB electronic ignition.

Rich

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06-18-06, 09:59 PM

71plymouth

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DAMN! my 83 does the same. WTF?

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06-18-06, 11:02 PM

Nicholas P.

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I had to change the coils on mine.

mine would start jumping. and then the tach would go dead. but yes, I changed the distrubitor and coils too.

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06-19-06, 12:13 AM

Kentetsu

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My tach started jumping around for the first time just a few days ago. I tracked it down to the ignitor plug (not plugged in all the way). I had had the distributor cap off to check the condition, and I guess I loosened the plug a bit when I did that. Plugged it in all the way and all was fine once again... On a points type ignition, I've no idea what would cause that.