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Home >> Porsche >> 2018 >> Macan GTS >> Repair and Diagnosis >> External Pages >> Different car >> Section 652 (Evaporative Emissions - V6 S/C 3.0L Petrol -- Discovery/L462) >> Evaporative Emissions - V6 S/C 3.0L Petrol >> Diagnosis And Testing >> Pinpoint Tests >> Pinpoint Test D: Purge Hose Bung Tests

Pinpoint Test D: Purge Hose Bung Tests

WARNING: This page is about a different car, the 2018 Land Rover Discovery and 2017 Land Rover Discovery. However, it is still accessible from the selected car via links, so may be relevant.
  1. D1: PURGE HOSE BUNG TEST 1 
    NOTE: This test is performed when a DTC indicates that a leak is present but an external leak has not been identified using the combustible gas detector.
    1. Disconnect the purge hose from the purge valve
    2. Install the appropriate bung to the purge hose
    3. Using the combustible gas detector, check for fuel vapor near the bung; allow fuel vapor to dissipate before proceeding
    4. Using the Jaguar Land Rover Approved Diagnostic Equipment, perform routine - Evaporative System Diagnostic Check - and use the combustible gas detector to check for leaks

    Was the source of the leak identified?



  1. D1: PURGE HOSE BUNG TEST 1 
    NOTE: This test is performed when a DTC indicates that a leak is present but an external leak has not been identified using the combustible gas detector.
    1. Disconnect the purge hose from the purge valve
    2. Install the appropriate bung to the purge hose
    3. Using the combustible gas detector, check for fuel vapor near the bung; allow fuel vapor to dissipate before proceeding
    4. Using the Jaguar Land Rover Approved Diagnostic Equipment, perform routine - Evaporative System Diagnostic Check - and use the combustible gas detector to check for leaks

    Test passed?

    • Yes: Remove the bung. Install a new purge valve. GO to Pinpoint Test E .
    • No: GO to  D2.
  2. D2: PURGE HOSE BUNG TEST 2 
    1. Consider the results of the previous test

    Was the source of the leak identified?

  3. D3: PURGE HOSE BUNG TEST 3 
    1. Remove the bung
    2. Reconnect the purge hose to the purge valve
    3. Using the Jaguar Land Rover Approved Diagnostic Equipment, perform routine - Evaporative System Diagnostic Check - and use the combustible gas detector to check for leaks

    Was the source of the leak identified?

    • Yes: Repair as necessary. GO to Pinpoint Test E .
    • No: Contact Dealer Technical Support
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