My van is bucking, but I don't think it is Vanagon syndrome. I pulled
the lead off the o2 sensor and the voltage does not change no matter
what the throttle position. I assume I need a new o2 sensor.

Does it matter what kind I get? Every vendor seems to carry a half
dozen of them. Ideally I'd like to pick something up at Canadian Tire
or Napa so I can use the van for the long weekend.

Also, what is the trick to remove these things? I could not budge it
with my wrench...

Chris