5000S Sedan L5-2226cc 2.22L SOHC (KZ) (1985)
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remove cap from CO probe receptacle
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connect CO test hose to probe receptacle (arrow)
^
hose must fit snug so there is no exhaust leak
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connect tester VW 1367 using cable adapter US 1112
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push % button on VW 1367
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start engine and run at idle
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check idle speed (duty cycle) with VW 1367
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checking value 28 ± 2% (with oxygen sensor connected)
If NO
