EVAP Purge Valve

This procedure covers removal and replacement of the EVAP purge valve on the 2008 Dodge Viper 8.4L V10, which controls vapor flow from the charcoal canister to the intake manifold.

Warnings

Tools required

Parts

• EVAP purge valve × 1 — Mopar 4891382AA or equivalent

Preparation

1. Park vehicle on level surface and allow engine to cool completely
2. Open hood and secure with prop rod
3. Identify the EVAP purge valve location on the driver side of the engine bay, mounted on the intake manifold near the throttle body

Procedure

1. 1

   Disconnect electrical connector
   Locate the electrical connector on the EVAP purge valve. Press the release tab on the connector and pull straight out to disconnect. The connector lock is a push-tab style common to Chrysler EVAP components.
2. 2

   Disconnect vapor line from purge valve inlet
   Locate the vapor line connection from the charcoal canister on the inlet side of the purge valve (side away from intake manifold). Press the quick-connect release tabs together or use a flathead screwdriver to depress the internal release mechanism while pulling the line straight out. Some residual fuel vapor odor is normal.
3. 3

   Disconnect vapor line from purge valve outlet
   Disconnect the vapor line from the outlet side of the purge valve (side toward intake manifold) using the same quick-connect release method. This line routes directly to the intake manifold. Support the line to prevent it from retracting into the engine bay.
4. 4

   Remove purge valve mounting
   The purge valve is retained to the intake manifold bracket by a single push-in clip or grommet mount. Grasp the purge valve body firmly and pull straight up to disengage from the mounting bracket. If resistance is encountered, gently rotate the valve while pulling to free the grommet.
5. 5

   Inspect mounting bracket and lines
   Inspect the mounting bracket grommet for tears or deterioration. Check both quick-connect fittings on the vapor lines for cracks or damage. Replace the mounting grommet if it is torn or has lost retention capability.
6. 6

   Install new purge valve
   Insert the new purge valve into the mounting bracket by aligning the valve body with the grommet and pushing firmly until fully seated. The valve should sit securely without lateral movement. Ensure the valve orientation matches the original installation with the electrical connector accessible.
7. 7

   Connect outlet vapor line
   Connect the outlet vapor line (to intake manifold) to the purge valve by pushing the quick-connect fitting straight onto the valve nipple until an audible click is heard. Tug gently on the line to verify it is locked in place.
8. 8

   Connect inlet vapor line
   Connect the inlet vapor line (from canister) to the purge valve by pushing the quick-connect fitting straight onto the valve nipple until an audible click is heard. Tug gently on the line to verify it is locked in place.
9. 9

   Connect electrical connector
   Push the electrical connector onto the purge valve solenoid until the locking tab clicks into place. Ensure the connector is fully seated and the lock tab is engaged.

Reassembly

1. Verify all vapor line connections are fully seated and locked
2. Ensure electrical connector is secure with lock tab engaged
3. Close hood after final inspection

Verification

• Start engine and allow to reach operating temperature; check for fuel vapor odor indicating leaking connections
• Use a scan tool to command the purge valve on/off and listen for audible clicking from the solenoid to confirm operation
• Monitor for diagnostic trouble codes P0441, P0443, or P0455 which would indicate purge system faults
• Perform an EVAP system leak test if scan tool capabilities allow

Related trouble codes on this vehicle

Codes that commonly send this job to the bay — tap one for symptoms, causes, and diagnostic steps.

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