weird o2 sensor readings? (mc'd urq)

[JShadzi at aol.com]

--
[ Picked text/plain from multipart/alternative ]
Mike, I'm not sure your digital multi-meter is able to necessarily keep up
with the rapidly changing voltage signal, you'd have better results with an
analog meter or a real O2 meter, $30 through Summit Racing.  I've never had very
good results trying to do what you're doing with a DMM.

HTH,

Javad

In a message dated 7/6/2003 6:01:57 PM Pacific Standard Time,
mike at borderlinemotorsports.com writes:

> so, apparently the sunpro multimeteri have fits perfectly behind the
> shiftboot andwill stay in place while driving.  i used an alligator
> clip to hold its ground (i used one of the grounds on the chassis
> under the driver's kick panel... that circular thing w/ lots of
> ground terminals), and then had the other lead connected to the wire
> i ran in from the engine bay....
>
> so, here's where the weirdness started... the display was showing
> about .400-.600v at idle, and would drop quickly under load, to
> almost zero....  so, i pulled over and turned the mixture screw about
> 1/2 turn clockwise (i know that's alot)... enough to cause the
> frequency valve to shut off at idle... got back in the car, and at
> idle, itwas reading about .800-.900v... ok... SEEMS closer... but
> assoon as i got on the gas, it would drop...
>