>  Has anyone ever tried substituting a manually variable
>resistor for either of the FI Temp senders(air/ coolant)?

Matt,

I have done something like this in the past. One cold winter day my Syncro
wouldn't start and troubleshooting showed the temp2 sensor was bad. I stuck
an appropriate fixed resistor in the plug to start and drive it until I
could get a new sensor. I think I had one for cold starting and one for hot
(I should look in my ashtray, I'm sure that's where they are stored!). I
considered the potentiometer idea, but was too lazy to run the wires up
front. Best solution is to keep a spare temp sensor.

Angus

================================
Angus Gordon                       '89 Carat
NW Ohio                            '86 Syncro