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Home >> Volkswagen >> 1991 >> Vanagon Base, Standard >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Basic Testing - Gasoline >> Idle Speed, Co Level & Ignition Timing
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Idle Speed, Co Level & Ignition Timing

Ensure idle speed, CO level and base ignition timing are set to specification. If necessary, see ADJUSTMENTS article in the ENGINE PERFORMANCE Section.

IDLE SPEED & CO LEVEL

Application Idle RPM CO Level %
Cabriolet 750-850 (1) .3-1.1
Corrado 750-850 .3-1.1
Fox 875-925 (2) 1.2-1.5
Golf, Jetta & GTI
1.8L (Digifant) 750-850 .3-1.1
2.0L (CIS-E) N/A (3) .2-1.2
Passat 700-900 (3) .2-1.2
Vanagon 830-930 .3-1.1
(1) Disconnect Blue coolant temperature sensor connector.
(2) Clamp crankcase breather hose near emission control valve.
(3) Not adjustable.
IGNITION TIMING (Degrees BTDC @ RPM)

Application Checking Adjusting
Except Vanagon (1) 4-8 @ 2000-2500 5-7 @ 2000-2500
Vanagon (1) 3-7 @ 2000-2500 4-6 @ 2000-2500
(1) Disconnect coolant temperature sensor.
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