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Re: Lousy fuel economy on '91 200TQW; advice, please.

>     Why don't you make up a bar gauge to measure O2 sensor output while
> driving? It should give you some insight into how rich the fuel mixture is
> under different operating conditions. I plan to whip one of these up for my
> S4 when I get a chance (and a LM3914 chip).
>     Check out
> http://efi332.eng.ohio-state.edu/diy_efi/projects/projects.html

Or even:


Now working on a digital boost gauge which will respond
reasonably quickly...  unlike the dash gauge.