Use an Ohm meter on the sensor. For a given temp. the
resistance is specified in the Bentley.  More important
it is likely this is not your problem, but there is a break in
the wiring going to the ECU. Keep in mind that there is 2 wires
that are making connection at the temp. sensor in one crimp
connector. One goes to the idle
stablizer, and one goes to the computer. Chances are the wire
that goes to the computer is opened. They tend to break in the engine
compartment where the engine rocks. Run a temperary jumper to
test...........or use and Ohm meter on the wiring harness
while someone moves the wires around.

            Eric                   86-VW4x4
            vw4x4@fyi.net          72-240z
            Pittsburgh, PA USA     1936-Chrysler

On Wed, 5 Aug 1998, Eric Pickering wrote:

> OK, after many suggestions (O2 sensor, thermostats, other wiring, etc) and
> much checking (O2 seems OK) the thermostat temp sensor (the blue one on the
> front left, heat sens #II-?) may be the culprit.  When the engine get warm
> and starts running crappy I unplug it and it starts to run just peachy.
> Now, it runs much better and doesn't stall out but it won't drive with much
> of a load (slight up hill).  So, do I just replace this sensor or might it
> yet be something else that I haven't investigated that the new info points
> to?  PLease respond ASAP and thanks to all who have.
>
> Eric
>