1983 SC running CIS with Lambda
I am preparing to tune my frequency valve duty cycle (for CA emissions testing) and wanted to check with you guys which of these is the better tool for that job.
I have this handy dandy Fluke clone from Amazon:
https://www.amazon.com/AideTek-VC97-Multimeter-Capacitor-Frequency/dp/B008GTEZPI/ref=cm_cr_arp_d_product_top?ie=UTF8
At the moment my mixture is set by ear, pushing/pulling on the air sensor arm by hand to find the sweet spot where it runs well. It is probably set on the rich side at the moment but runs great. Anyway I connected the multimeter to the green wire on the test port and while it warms up it reads a looping duty cycle of 50-80% every few seconds until it reaches operating temp, then it reads a fluctuating 75-82%
Based on this I think the multimeter is doing its job. I mean, the number on the display is a tad jumpy but its readable.
I also have this OG dwell meter leftover from my VW bus days.
https://www.amazon.com/Actron-CP7605-Tachometer-Voltmeter-Analyzer/dp/B00062YUUS/ref=cm_cr_arp_d_product_top?ie=UTF8
It still works. When I connect it, the dial rises to some value and slowly sweeps back and forth within some operating range but I have no idea how to read it. Do I use the 6 cylinder scale or use the 4 cylinder scale as indicated in some prior threads?
Thanks in advance!