Tach needle fluttering with pertronix 1761 at idle

[jalexquijano]

Last saturday i decided to install a pertronix ignitor 1761 module with 1.5 coil asides from replacing the 4 year old battery with a 12 volt 600 amp brand new battery. Even though i have cleaned and tightened all the female and male connectors at the coil, i am still experiencing some needle fluttering when the car is at idle. Is this normal or could it be fixed? Do i need to widen the gap between the ignitor sensor and the magnet Installed in the distributor?  I read in one fórum that for single point distributors this is not needed.

Anyway, i also noticed that when the engine is warming up the needle does remain steady at its idling rpm.

[C.A.R.]

You'll need to get the Tacho rebuilt to suit the electronic ignition - they don't like the electronic pulses.
It'll also get to 5000rpm and start bouncing around like a toddler on red cordial.

[jalexquijano]

The needle never flutter in the past. Really strange.

[gav240z]

I was curious if the petronix ignitor worked with the stock tach. I guess it doesn't perfectly.

[jalexquijano]

well it Works with my 1972 240z with 1.5 pertronix coil and ballast resistor. The problem is to try and figure out how to avoid the needle fluttering at idle.

[1600dave]

On ‎8‎/‎1‎/‎2018 at 7:28 AM, Lurch said:

You'll need to get the Tacho rebuilt to suit the electronic ignition - they don't like the electronic pulses.
 

One could argue that it doesn;t work on your 240Z with pertronix ignitor. Lurch has provided a solution

Edited August 1, 2018 by 1600dave