Idle RPMs

[Soixantaine]

In the interest of furthering my knowledge of car electronics, I've bought myself a new toy. To check idle RPMs, the manual (if you can call it that) says connect black to "-" battery post, easy enough, and red to "-" coil wire, not so easy. The coil, apparently, is inside the distributor. Haynes says take distributor out and dismantle to get to coil. Obviously, car won't run without a distributor. Anyone had any experience with setting idle RPMs with this sort of meter?

S

 

[Alienfish360]

will it not be the blue wire that is used as the signal for tachos?

 

[Raceworx]

yeah just put the balck on a ground and try it on the blue signal wire from the dist...

 

[Soixantaine]

Okay, thanks, that seems to have been it (the blue wire). Thought about trying that but didn't want to start clamping on to any old wire. The LX's idle speed is x 10 which makes it way too high. I tried it on the Super S, with factory tach, and the readings were all over the place. A high of around 60 (X 10) to lows in the teens. Is that because of the factory tach signals? The Super's tach reads about 650 RPMs at warm idle.

S

 

[mean micra]

my super s floats just above 1000rpm on start up and yeh around 650rpm warm idle...

 

[Alienfish360]

How much was the meter?