Is it possible or even necessary to attach a tachometer to the ignition coil in my 94 XFi? Below is a photo of what the coil looks like:
The coil is mounted on the firewall and a 2 wire cable connects to it from the vehicle. My Chilton's 1985-2000 Repair Manual for Chevy Sprint/Metro, Geo Metro and Suzuki Swift reads as follows under
Idle Speed & Misture Adjustments:
1994 - 00
The 1994 - 00 engines covered by this manual utilize sophisticated fuel injection systems in which an engine control computer utilizes information from various sensors to control idle speed and air/fuel mixtures. No periodic adjustments are either necessary or possible on these systems.....
Yesterday I purchased the 1994 Geo Metro Factory Service Manual off of eBay and I should receive it the later part of next week.
All the best,
Z33ky