For 1990-2009 cars only
- Turn OFF the ignition.
- Remove the purge solenoid vacuum line from the solenoid.
- Remove the EVAP purge solenoid from the engine.
- Lightly tap the purge solenoid on a clean work area looking for carbon particles or carbon dust exiting either of the vacuum ports.
- Reinstall the components and continue with the published service manual DTC procedures if no carbon release is evident.
- Continue with this service procedure if carbon is being released from the component.
- Remove the charcoal canister from the vehicle. Refer to Evaporative Emission Canister Replacement .
- Ensure the main cylinder valve is turned off on the EVAP purge/pressure diagnostic station J 41413.
- Disconnect the black hose that connects the nitrogen cylinder to the cart J 41413 at the pressure regulator by unscrewing the knurled nut on the regulator.
- Connect one end over the open fitting of the J 41413 pressure regulator using a section of vacuum line.
- Connect the remaining end to the purge solenoid end of the EVAP purge line at the vehicle.
- Turn on the main nitrogen cylinder valve and continue to blow any debris from the purge line for 15 seconds.
- Return the EVAP Pressure/Purge Diagnostic Station J 41413 to its original condition by re-installing the black hose disconnected in step 9.
- Idle the engine at the normal operating temperature.
- Open the throttle until engine speed reaches 2000 RPM.
- Connect the EVAP diagnostic cart J 41413 to the vehicle EVAP service port and turn the 4 position switch to Purge.
- Idle the engine at the normal operating temperature.
- Open the throttle until engine speed reaches 2000 RPM.
- Note the H20 vacuum gauge on the EVAP cart. Vacuum should read greater than 15 in. H2O.
- Inspect the vacuum supply to the EVAP purge valve if the vacuum is less than 15 in. H2O.
- Continue with the published service diagnostics if the vacuum is greater than 15 in. H2O.
