You can test the fan speeds by telling the car to run a diagnostic:

http://www.sjmautotechnik.com/ecufv8.html#instout

I suggest reading the whole page, but it is pretty easy stuff. Let me know if you have any questions.

Cheers,

- Jeremy

1990 V8Q Zyclam Portland, Oregon (USA) http://www.MyV8Q.com/ Fun, Fun, Fun auf der Autobahn