Since I have determined that the O2 sensor is at fault, I'm going to
replace that. Then I plan to go through and replace other things.
Definitely the thermostat and I might as well replace the Temp II
while I'm in there. What is the other sensor on the thermostat housing?

The thing is I live less than a mile from work so I rarely drive far
enough for the van to properly warm up. Since it's been less than
reliable, I drive my truck when I know I'm going outside of Indy. This
problem could have started weeks ago but since the engine hasn't been
driven long enough lately to warm up, it didn't present the problem
until last week when I decided to drive it to the west side of town.

Anyhow, I'm glad I'm starting to understand what makes it tick (I
think).

Mark K
1986 GL 2WD

On Jan 12, 2009, at 3:26 PM, Scott Daniel - Turbovans wrote:

> seems like the temp sensor for the ecu would be a good part and
> input to
> check, plus connections to it.
>
> if it's not running half way up the gauge.........
> one of my firm rules is 'fix what you know is
> broken' ................I'd
> get it running up to temp for sure, just to start with.
> I can't emphasize the importance of that enough.  It's gotta be
> running at
> at least 175 digress F.    195 is preferred for winter......
> usually that is just to the right of the LED in the temp gauge.  180
> is the
> 'par norm' ..........
> but it's gotta be running up to temp.