trip computer weirdness-VW 1301?

[Nick]

Vehicles are '90 200 and '91 100.

I'm trying to determine why my trip computer is so far off.  Both the 
average mpg and the miles to empty.
One of the test from Bentley uses a VW1301 test tool to measure the fuel 
sending unit. It says set the VW1301 to 250. Connect between two terminals 
on the fuel guage sender harness.
Does anyone know if that is 250 ohms?  Probably representing a certain 
fuel level in the tank.

Has anyone ever adjusted the air flow sensor potentiometer?

TIA
Nick


-- 
Using M2, Opera's revolutionary e-mail client: http://www.opera.com/m2/