Hi all, Can these LED fuel mixture meters I keep seeing in European Car magazine such as the "Dynograph" by Perfomance Instrumentation be used to read CIS F.I. CO percent also? Looks like they hook into the OXY sensor. Or is there no substitute for a good CO meter and probe? Tony '85 4kcsq '80 5ks -- Tony Lum mailto:tlum@ascor-inc.com Systems Administrator Ascor, Inc.