rm125

I upgraded from points to electronic dist., but now my tach does not work, any help would be greatly appreciated. I know the tach is run off the coils but what would cause this problem?

Kentetsu

Confirm that you have spark on the trailing ignition. A bad ignitor will cause this issue.

Rx-7Doctor

iTrader: (13)

The other thing that can happen but not often is that if the T1 plug is bad. Which means it just does not fire due to a defect it will lose the signal to the tach. How do i know, it happened to me when i bought my current Gs. Checked ignitors, good, had fire to T2 but checking T1 plug out of chamber it did not fire. Replacee plug and tach back to normal. Yes, i have all the weird ship happen to me, lol.

Midwest 7's

iTrader: (4)

i had the same problem when i did my swap and it ended up being that i needed to connect one of the old wires back to the + terminal of the coil to make it work.

rm125

I think it is wiring