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File type:
Link
File description: Exhaust gas analyzer Your name: (optional) Randall
File: Click here to d/l...
Check out
http://www.diy-efi.org/diy_efi/members_projects.html
It has several plans for both simple (like the Heathkit and all the
commercial units in the $100-$300 range) and complex (wide band) O2
analyzers.
You might also want to scan the DIY_EFI archives
http://www.diy-efi.org/diy_efi/asearch.html
for any further information on the wide band sensor. I've been told
that the initial plan presented had some serious shortcomings, but I
don't know if that's true, or what they were, or if they were corrected.