You could check the sensors that you have removed in a pan of hot water
using a thermometer and an ohmmeter.  Compare the resistance with the
chart in the Bentley.
  It may be possible that the connector or its wire is flaky and you
improved the connection temporarily when you disturbed it during the
installation of the sensors.

Larry A.

Jeff Lincoln wrote:

> Well, back in late April or Early May I replaced the Temp 2 Sensor and it
> cured what ailed my 90' with the rough rich running and back firing.
> It was
> great. Well, a couple weeks later it started doing the same thing again.
> Common sense says it was the Temp 2 sensor agin - but I have no common
> sense
> and thought it couldn't be because it was just replaced. Well, I just
> put in
> a new sensor and sure enough that seems to have been the problem again.
> Someone suggested that sometimes the sensors can be bad off the shelf.
> That
> may be the case - however I was also wondering if there is something else
> that could have made the new sensor go bad so quickly?
>
> What does everyoneout there think? Can something make the sensor go bad
> within a short period of time or did I just get unlucky and get a poor
> sensor to begin with?
>
> --
> Thanks,
>
> Jeff
> 90' Carat (It's Blue, It's Beautiful. Now sporting a very unstylish brown
> interior taken from the parts bus)
> 86' (We call this one Parts)
> 85' GL (Sidelined and feeling neglected)
>