Ecosport fuel tank ventilation leak

Hi, I'm having a weird issue with my 2004 Ford Ecosport, gasoline engine. The check engine light keeps coming on, and the engine sometimes stalls when I'm idling. I've run a scan, and it seems to point to a fuel tank ventilation system leak. Could this be a defective activated charcoal filter, or is there anything else to look for?

4 comment(s)

Sounds like EVAP alright. Had similar stalling issues on my old Opel Corsa after I filled the tank to the brim one time. It could be a stuck purge valve, or cracked hoses, but if you're getting codes related to the charcoal canister, start there.

Thanks! So, if it's the charcoal canister, is there a way to test it, or is it just a matter of replacing it and hoping for the best? Also, will this affect my fuel efficiency?

Testing it would be fiddly, needing smoke and whatnot. My Corsa ended up needing a new canister after all. As for fuel efficiency, yeah, a big enough EVAP leak can mess with the air/fuel ratio because the system isn't working right. Probably best to take it to a workshop.

Thanks, I took your advice and brought it in. Turns out it was a defective activated charcoal filter as suspected. The repair cost was 275€. Runs like a champ now!

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