I was search for an Air/Fuel Meter this morning. I ran across thie DIY project to build a A/F Meter. I am going to try and build this one, this weekend.

DIY A/F Meter (http://www.markvanderkwaak.com/dbbp/tech-tips/mm.html)

just so long as it reads the correct voltage i dont see why it shouldnt work. i wouldnt stake my life on the results, but having cool things in the cockpit is a plus and chic's dig shiney flashing lights :sun:

It would be a neat little toy but don't expect excellent tuning capability from this. Check out the SE-R mailing list (http://se-r-list.org) archives for some discussion on the DIY A/F meter and 3 wire oxygen sensors, with regard to engine tuning, in general.