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Home >> Porsche >> 1992 >> 968 Coupe L4-2990cc 3.0L DOHC >> Repair and Diagnosis >> Powertrain Management >> Computers and Control Systems >> Testing and Inspection >> Pinpoint Tests >> Test Point 29 - Intake System Leaks
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Test Point 29 - Intake System Leaks

TEST POINT 29 - Intake System Leaks

Check all connections downstream of the air flow sensor for leaks. Remove upper air cleaner section. Attach Special Tool 9264/4 to the air mass sensor and build up a positive pressure of approx. 0.5 bar in the intake system. Leaks will cause the pressure in the intake system to drop quickly.

NOTE: Fault flashing code 1_23 (oxygen regulator at stop) appears in cars with oxygen regulation and very large leaks in the intake system (e.g. intake pipe gasket).

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