Evaporative Emission System Cleaning
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Evaporative Emission System Cleaning
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Special Tools
GE 41413-200
Evaporative Pressure and Purge Station
For equivalent regional tools, refer to
Special Tools (Diesel Scan Tool)
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Warning
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Use Evaporative Emission (EVAP) System Tester (EEST) GE 41413-A in order to provide a clean, dry nitrogen gas source with low pressure. Do not substitute any other pressurized substance, gas or similar. It could damage the venting system and constitute a safety risk.
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1.
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Note
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Proceed with the following procedure only if referenced by an evaporative emission (EVAP) diagnostic or repair procedure.
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Turn OFF the ignition.
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3.
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Lightly tap the EVAP canister purge valve on a hard surface.
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4.
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Inspect for carbon particles exiting either of the vacuum ports.
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If no carbon particles were detected, but a blockage was detected during a diagnostic procedure, install the original EVAP canister purge valve. Continue with the cleaning procedure.
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If carbon particles are found during the inspection procedure, continue with the cleaning procedure.
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If a diagnostic procedure directed you to replace the EVAP canister purge valve and no carbon particles were detected, replace the EVAP canister purge valve. Return to the published service procedure.
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3.
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Turn OFF the main valve on the
GE 41413-200
station.
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4.
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Disconnect the hose from the diagnostic station pressure regulator.
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5.
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Using a section of vacuum hose, connect one end onto the EVAP pressure/purge diagnostic station pressure regulator.
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6.
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Connect the other end of the vacuum hose to the canister side of the purge pipe.
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7.
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Turn ON the main nitrogen cylinder valve and continue to discharge nitrogen for 15 seconds.
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8.
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If the nitrogen does not clear the blockage, replace the purge pipe.
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9.
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Return the EVAP pressure/purge diagnostic station to the stations original condition.
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13.
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Return to the diagnostic table that sent you here.
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