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Home >> Volkswagen >> 1997 >> Passat GLX, 4D Sedan, Standard >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - System/Component Tests - 2.8L >> Air Induction Systems >> Intake Air Preheating >> Air Leak Checks
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Air Leak Checks

  1. Ensure exhaust system has no leaks. Connect Scan Tool (VAG 1551/1552) using Adapter (VAG 1551/3). Start engine and allow it to idle at closed throttle position. With scan tool in READ MEASURING VALVE BLOCK function, select function 08 and press "Q" button to confirm input. Note Oxygen Sensor (O2S) control in display field No. 3.
  2. Spray air intake system with Leak Detector Spray (G 001 800 A1). Air intake leaks will draw in leak detector spray. The spray reduces air/fuel mixture ignition and engine RPM, and decreases CO reading. Repair leaks as necessary.
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