when  using sealants on any engine read the label for "sensor safe"
when using additives,if it isnt injector cleaner,  don't.

jimt
On Thursday, September 12, 2002, at 09:03 AM, Brian Doss wrote:

> I've heard that certain fuel additives or even exhaust flange sealants
> will
> screw up your Ox Sensor.  I did run some Marvel Mystery Oil through my
> fuel
> tank just for kicks once, and I used some kind of hardening sealant on
> my
> joints when I installed my SS header kit.  Performance is not up to
> par, and
> I'm wondering about that sensor.  Also, read on list about checking
> sensor
> with volt meter.  Exactly which wires does one check on the 3 wire
> system?
>
> Thanks
> Brian Doss
> '88 Weekender, Queequeg
>