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Home >> Porsche >> 2019 >> Cayenne Turbo >> Repair and Diagnosis >> Engine Mechanical >> Fuel System >> 20 Fuel Supply, Actuator 4.0L -- 9YA - Cayenne (9YA) >> WM, 200101 Checking Fuel System >> Checking Fuel System (High-Pressure Side) >> Checking Fuel System (Leak-Testing)

Checking Fuel System (Leak-Testing)

  1. Spray all connection points of the high-pressure pump with commercially available leak-locating spray and check for pressure gas leaks (air bubbles).
  2. If the pressure drops ever, cough the threaded connections are perfect: 

    Spray all components of the fuel high-pressure system with leak-locating spray and check for pressure gas leaks (air bubbles).

  3. If the pressure drops even though the fuel high-pressure system is perfect: 

    Spray all test tools with leak-locating spray and check for pressure gas leaks (air bubbles).

  4. Fix the leak and repeat the leak test.
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