Check / Adjust Idle and Maximum Speed

Adjust idle speed

Connect tachometer— With engine warm, check idle speed.

  • 820 ± 50 RPM (1977 – 82 and 83 Vanagon)
  • 880 + 50 RPM (1983 Rabbit/Jetta)
  • 950 + 50 RPM (82/83 Quantum, 4000)

Loosen locknut and turn adjusting screw.

  • Clockwise increases RPM
  • Counterclockwise decreases RPM

Tighten locknut.

1.082

 

Adjust maximum speed

1.083

Accelerate engine briefly to “maximum speed stop.”

  • 1.6 L (5300 – 5400 RPM)
  • 1.5 L (5500 – 5600 RPM)
  • Vanagon (4750 – 4850 RPM)

Adjust by loosening lockut and turning maximum speed screw.

  • Clockwise decreases maximum RPM
  • Counter clockwise increases maximum RPM