Discussion
Mark Adams at Tornado systems can repair them but also has a shelf full of them. I was there the other week. I think they can be tested my measuring the resistance as the internals are rotated. If the resistance reading isnt a smooth linear increase or decrease then the carbon track is worn.
I think the airflow sensor is the hot wire type. Before spending your hard earned, have a look at this thread about cleaning it.
https://www.pistonheads.com/gassing/topic.asp?h=0&...
https://www.pistonheads.com/gassing/topic.asp?h=0&...
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