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1.8L Turbo Engine

When intake manifold temperature is 59-122°F (15-50°C), thermo vacuum valve I vents distributor vacuum line to atmosphere so no vacuum advance is applied. When engine is below or above these temperatures, vacuum is obtained from a throttle port above throttle valve and is applied to vacuum advance unit. See Fig 1 .

Fig 1: Ignition Control System (1.8L Turbo)