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V90 L6-2.9L VIN 96 B6304S (1998)

Engine, Cooling and Exhaust > Engine > Tune-up and Engine Performance Checks > Air/Fuel Mixture > System Information > Description and Operation > Page 1268

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Air/Fuel Mixture: Testing and Inspection

Connect Test Instrument

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Tachometer.

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CO meter connected to exhaust pipe.

Conditions:

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Engine idling.

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No diagnostic trouble codes (DTCs) stored.

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Air conditioning (A/C) off.

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Automatic transmission: gear selector in P.

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Seal hose between canister purge (CP) valve and intake manifold with a hose clip.

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Seal crankcase ventilation with a hose clip.

NOTE:  If the car is often driven in urban traffic (starting, idling etc.) the engine oil may be contaminated with fuel. Crankcase gases may affect
CO adjustment.

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Run the engine to normal operating temperature. Run the engine at 1,500 rpm.

NOTE:  The engine should be run until the coolant thermostat opens and then for a further 10 minutes.

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Check CO content.

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Check value = 0.5 - 2.0%

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Continue adjusting CO content if necessary.

Engine, Cooling and Exhaust > Engine > Tune-up and Engine Performance Checks > Air/Fuel Mixture > System Information > Description and Operation > Page 1268

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