Tachometer not working with 123 Ignition

[c1800]

From Phil Singer on swedespeed.

"Back off the throttle stop screw until it doesn't make contact, then turn it in to the point of contact and 1/2 turn further. Lock it there. Adjust idle speed with the air bypass thingy under the accordion duct."

[Darren SV]

Thanks! I will work on it tomorrow after work.

[25PSi]

Originally Posted by Darren SV

Thanks for all your help.

Update:
The car is running. It needs tuning for sure.
I got the tach (rev counter) to work. I just hooked it inline onto the black cable from the 123 distributor to the negative on the coil.

It is idling about 1500. It was idling about 2500 to 3000 before I adjusted it.

I slowed it down by turning the distributor a little bit (so the advance is out by 10 degrees - which my manual says it should be set to) and by unscrewing the idle screw at the end of the throttle cable. If I unscrew it any more, it runs very rough.
What should the idle be on my ES?
Any tips on how to better adjust it?

I just remembered I have a screw directly under the front of the manifold. (see pic - screw bottom right - note: this not my manifold). Is this an idle adjust screw also? I will try it tomorrow.

Thanks.

Darren

I was trying to send private message but apparently i am not allowed.

Would you be so kind to share diagram and.or photo of the "Secret Sauce" you figured to get tach working with 123 please? MUCH appreciated.

[25PSi]

Originally Posted by Darren SV

Thanks! I will work on it tomorrow after work.

To get Smith Tachometer working it needs to be wired in such way: