Re: there is fuel in the charcoal canister !
Yes In fact I did. The first time it happened I concluded it was the purge solenoid valve malfunction under the bonnet/hood. After replacing the solenoid and the charcoal canaster a few days later it happened again. Soooooo. after weeks of bashing my head against the wall ...........
1- No, Filling and topping off the tank has nothing to do with this issue.
2- I removed the canister and set it up away from the house and connected my shop vac exhaust to it in order to dry out the canister.
In addition I disassembled the old canister for inspection. no issues found. The check valve worked perfectly.
3- I removed and cut open the fuel filter for inspection no issued found.
4- I tested the pressure sensor in the tank. No issues Also there is no way you can over fill the tank and cause this issue. It fills and the pump stops
5- I tested the purge solenoid and checked for the proper signal from the ECU. I had signal but the "New" purge solenoid valve was stuck open with a very powerful suction at the canister.
6- I replaced the purge solenoid valve, new from MB. Installed the dried out canister Replaced the fuel filter Again.
The car has performed very well since.
So I replaced the purge solenoid valve with a new defective one and the problem repeated itself.
The purge solenoid valve was the issue all along.
Last edited by Anthony C; Jun 30, 2025 at 09:03 PM.