ryan:

these leaks are downstream of the sensor and should not make a difference.

a good quality meter with high impedence is necessary. in general, AC will
be the choice, but you may want to experiment with DC as well. output will
be on the order of 1/2 volt, so that suggests picking a range up to at
least 2 volts.

the measurements are made with O2 sensor connector still connected, of
course (in other words, computer and meter are in parallel with each
other).

dan

On Thu, 17 Jun 2004 21:33:49 -0400, Ryan Dawson <rdawson@UOGUELPH.CA>
wrote:

>Hi Everyone,
>
>Can someone tell me whether I should have my multimeter set on AC or DC
>current, and what scale I should have it set at to take the reading?
This may
>be a dumb question, but I have no idea as I just got this tool.
>
>Also, if there is an exhaust gasket missing between the muffler and the
CAT,
>will this affect the O2 sensor?
>
>Thanks,
>Ryan