Repair Procedure

This bulletin involves the replacement of the rollover valve, the purge solenoid, the vapor harness, and the vapor carbon canister.

1. Disconnect the negative battery cable.

2. Disconnect the evaporative system vapor purge line from the engine throttle body.

3. Disconnect the electrical connection and all lines to the purge solenoid. Remove and discard the purge solenoid.

4. Disconnect all lines to the vapor canister and remove the vapor canister.

5. Disconnect the vapor line from the vehicle fuel tank rollover valve.

6. With compressed air, thoroughly clean all evaporative system lines including, the throttle body-to-purge solenoid line, the purge solenoid-to-vapor carbon canister line, the vapor carbon canister-to-rollover valve line, and the canister-to-atmosphere line.

NOTE:
THE EVAPORATIVE SYSTEM MUST BE FREE OF ALL LOOSE CARBON PARTICLES, OTHERWISE THE PURGE SOLENOID MAY AGAIN BECOME STUCK IN THE OPEN POSITION. MAKE SURE NO DIRT ENTERS THE LINES.

7. Inspect the throttle body port. Insert a thin wire into the throttle body evaporative purge port to make sure that there are no restrictions (carbon particles) present.

8. Connect the evaporative system purge line to the throttle body.

9. Replace the vapor harness. Be careful not to introduce dirt into the evaporative system.

10. Install the new purge solenoid including both lines and electrical connection.

NOTE:
THE 1996 - 1997 DUTY CYCLE PURGE SOLENOID HAS MARKINGS ON ITS HOUSING WHICH DENOTE CORRECT ORIENTATION. MAKE SURE IT IS POSITIONED RIGHT SIDE UP.

11. Install the vapor carbon canister to its bracket. Rotate the canister until the line fittings are in a horizontal position. Tighten the vapor carbon canister bracket bolt to 10 Nm (95 in. lbs.).

NOTE:
THE BUILD DATE CODE ON THE BOTTOM OF THE VAPOR CARBON CANISTER MUST BE 1876 OR LATER. THE "187" = 187th JULIAN DAY OF AND THE "6" = 1996.

12. Replace the vehicle rollover valve on vehicles built prior to 12/01/95 (MDH 12-01- XX). The 52127666 rollover valve housing will be black in color with a small white cap on the top.

13. Connect the evaporative system vapor line to the rollover valve.

14. If the Check Engine" lamp is on due to DTC $71, record Freeze Frame Data and erase the fault code.