Examination
Erratic engine idling and reduced engine efficiency can be caused by an inoperative canister purge solenoid valve, a damaged canister, or defective hoses.
Check the condition of the hoses connected to the canister. Replace if necessary.
Check the condition of the canister. If the canister is not tight, replace it.
If there is a suspicion that the canister cleaning solenoid valve is not working, remove the electrical connector from it and disconnect the hoses. Connect the battery terminals with additional wires directly to the valve contacts. Blow out the valve. Air must pass. Disconnect the battery and re-purge the valve with air. Air must not pass.
Charcoal Canister Purge Valve Replacement
The solenoid valve is located on the front right side of the engine compartment near the headlight (all engines except Zetec and Zetec-E). On Zetec and Zetec-E engines, the valve is located on the baffle behind the engine on the right side (see fig. 4E.20).
Remove the negative terminal from the battery and disconnect the electrical connector from the solenoid valve. Disconnect the hoses from the valve and remove it.
Installation is carried out in the reverse order of removal.
Replacing the charcoal canister
Remove the negative terminal from the battery.
The canister is located under the expansion tank. To access the canister, remove the expansion tank. To access the back of the canister, lift the front of the car and remove the right wheel. Disconnect the hoses from the canister. Close them with corks.
Unscrew the fastening screws and remove the canister from under the wheel arch. Installation is made in sequence, return to removal.
Visitor comments