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Home >> Volkswagen >> 1993 >> Fox Base, 1.8 A >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - System/Component Tests >> Fuel System >> Acceleration/Full Throttle Enrichment & DECEL Fuel Cut-Off >> Fox 1.8L Digifant I (California)
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Fox 1.8L Digifant I (California)

  1. Connect Scan Tester (VAG 1551) to Data Link Connectors (DLC) located in center console. Start engine and allow it to idle. With scan tester in READ MEASURING VALUE BLOCK function, ensure coolant temperature is more than 176°F (80°C) as displayed in channel No. 3 of scan tester. Value should be 11.
  2. Accelerate engine, 3 times, to 3000 RPM as displayed in scan tester channel No. 1. Allow engine to run 2 minutes at idle. Read and record closed throttle position value in channel No. 4 of scan tester.
  3. Check full throttle load enrichment by gradually pressing down accelerator to 3000 RPM and then releasing it. Display value must increase, drop down to 0 milliseconds, then return to value recorded at closed throttle. If specified values are not obtained, check THROTTLE VALVE POTENTIOMETER adjustment in the ADJUSTMENTS article.
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