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Home >> Porsche >> 1989 >> 911 Turbo, 2D Convertible >> Repair and Diagnosis >> Engine Performance >> System >> System/Component Tests >> Engine Sensors & Switches >> Throttle Switch (Coasting Fuel Shut-Off Function)

Throttle Switch (Coasting Fuel Shut-Off Function)

  1. With engine at idle speed, bridge disconnected plug of idle switch with a jumper wire. Accelerate engine to approximately 1300 RPM. Engine should begin to surge (this is coasting fuel shut-off).
  2. If engine does not surge, check wire between idle switch plug and control unit plug for breaks according to wiring diagram. If necessary, replace control unit.
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