More O2 sensor news

[Brian Devlin <bdevlin@stanford.edu>]

As mentioned in my previous post, full throttle gives zero volts 
below ~3000 rpm (i'm not sure exactly when it gets rich, but it does 
by 4000). It turns out that it's not just a slow response by the 
sensor, it goes to zero and stays there, and will not rise until the 
rpms do.

I want to check the pressure regulator, to see what it's doing at 
this time. I can check amps, as some of you suggested, but I could 
also check duty cycle. Which would be better?

Thanks everybody who responded so far. When I get a chance to try out 
your suggestions, I'll post the result.
-Brian