Idle Speed, Co Level & Ignition Timing

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

IDLE SPEED & CO LEVEL

Application

Idle RPM

% CO Level

Cabriolet

⁽¹⁾ 750-850

.3-1.1

Corrado

1.8L

750-850

.3-1.1

2.8L

N/A

Fox

875-925

⁽²⁾ 1.2-1.5

Golf, Jetta & GTI

1.8L (Digifant)

750-850

.3-1.1

2.0L (CIS-E)

⁽³⁾ 800-1000

.2-1.2

Passat

⁽³⁾ 700-900

.2-1.0

⁽¹⁾	Disconnect coolant temperature sensor Blue connector.

⁽²⁾	Clamp crankcase breather hose near emission control valve.

⁽³⁾	Not adjustable.

IGNITION TIMING (Degrees BTDC @ RPM)

Application

Checking

Adjusting

1.8L ⁽¹⁾

4-8 @ 2000-2500

5-7 @ 2000-2500

2.0L

Except Passat

4-8 @ 800-1000

5-7 @ 800-1000

Passat

4-8 @ 700-900

5-7 @ 700-900

2.8L

4-8 @ 650-750

⁽²⁾ *

⁽¹⁾	With coolant temperature sensor Blue connector disconnected.

⁽²⁾	Ignition timing not adjustable.