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Home >> Volkswagen >> 1990 >> Cabriolet Base, Automatic >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Basic Testing >> 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.

IDLE SPEED & CO LEVEL

Application Idle RPM CO Level %
All Models 800-1000 0.3-1.2%
IGNITION TIMING (Degrees BTDC @ RPM)

Application Checking Adjusting
1.8L 4-8 @ 2250-2350 5-7 @ 2250-2350
2.0L 4-8 @ 770-830 5-7 @ 770-830
2.1L (1) 4-8 @ 2250-2350 5-7 @ 2250-2350
(1) With coolant temperature sensor disconnected.