I got a NB oxygen sensor from Mark Henry today (thanks!) and continued with my CHT reisistor project.

Looking at it as a non-invasive way of increasing richness across mixture for fuel injection engines with increased displacement and/or ported heads/increased exhaust flow without messing with the MPS (which I will never be able to tune right).

My car still runs lean but my kit and knowledge of resistance-to-richness ratio is increasing....

The project is unorothdox I know, but its fun and seems like its plausible...the project continues.

Its pretty easy to tune and adjust the MPS IF you use a wideband. You can tune it by ear too but thats pretty hard to turn the screws.