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Home >> Porsche >> 1989 >> 928 CS V8-4957cc 5.0L >> Repair and Diagnosis >> Powertrain Management >> Computers and Control Systems >> Testing and Inspection >> Pinpoint Tests >> LH Test Points (Fuel Injection) >> Test Point 18 - Intake System Leaks
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Test Point 18 - Intake System Leaks

TEST POINT 18: Intake system leaks

- Check all connections after the air mass sensor for tightness and freedom from leaks.




- Attach special tool 9264/1 to the air mass sensor with M 4 x 45 mm bolts and build up a pressure of 0.3 bar (4.4 psi). If there are any leaks, pressure will drop in the intake system or air will be heard escaping..

NOTE: On cars with oxygen regulator, flashing fault code 1_23 (oxygen regulator at rich stop) appears if there are severe leaks in the intake system (for example the intake pipe gasket).
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