I thought the switch clicks when the throttle is nearly fully opened and causes the injectors to go into a max mode, which dumps fuel into the engine.  I have heard of these causing problems before.  Both my '87 GLI and '85 Westy had these types of switches, but I didn't have fuel-related issues in either vehicle.

Chris.

Kenneth Lewis <kdlewis@NORTHSTATE.NET> wrote: Cecil,
   The switch is operated by a cam on the throttle axle. The switch should
close at both extremes of it's travel.
Ken Lewis
http://neksiwel.20m.com/

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