Quote Originally Posted by wbjunkie View Post
we both know a lawn mower engine will not have map, maf, tps, o2, coolant temp etc, servo motor position etc
Other than the obvious economical reasons...Why not? As crazy as emission regulations are getting these day, I can see it happening sooner or later...either that or we all get electric mower and move the emissions concerns to the power plants! I attached a standard 3-wire O2 sensor to a 17HP Koehler exhaust awhile back, just to see what was what. Of course, by the time I leaned it out to stoich, it didn't have any leftover grunt to pull thru tall grass, and practically no acceleration.

You may be trying to save some time, so why not save us some time while you're at it...

Are we talking about an engine already installed in a vehicle? A production vehicle, such as a Chevy, or a Honda? Or a sort of homemade 'dune buggy' off-road type machine?
Fuel injected or carb'd?
Does it all matter? Well, yes, maybe no. Depends. A post '96 V-6 already installed in a production vehicle would be a relative piece of cake to get that data already formatted for you. Something a bit earlier, yes, that'll need a lot of analog signal conditioning before you can get reliable, repeatable results.

So....whatcha got?