5000CS Turbo L5-2226cc 2.22L SOHC Turbo (MC) (1987)
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connect hose from exhaust gas analyzer (Sun 105 or PA equivalent) to CO measuring tap (arrow)
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disconnect and seal crankcase breather hose at cylinder head cover (arrows)
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remove cap from T-connector at charcoal canister hose
Checking and Adjusting Idle Speed (Duty Cycle)
NOTE: Radiator fan must not be running while checking or adjusting
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start engine, allow to idle, and observe multimeter US 1119
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specification: 430 ± 20 mA
IF NO
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correct mA reading by means of idle adjustment screw
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after checking/adjusting differential pressure regulator current, check idle speed as displayed on VW 136
^ specification: 800 ± 50 rpm (manual trans.)
720 ± 50 rpm (automatic trans.)
IF NO
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check idle speed stabilizer system and repair as necessary
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switch ignition OFF