shortskoolbus

I disconnected all the hoses from the charcoal canister and still couldn't fill gas, so i don't believe that the problem is at the canister. I guess that's the pressure control solenoid valve, that one is supposed to be closed when not energized i believe? So i don't think that would make a difference.

Also, i noticed that ferret says the drain valve is to let air out, but actually I believe it's to let air in. It's usually closed, and when energized it OPENS to let air into the canister. It will get energized by the ECM when the purge valve opens it needs to allow air in from the atmosphere in order to maintain the pressure within the EVAP system.

Hey Thanks. I saw ferret's post but i don't think it's the the same issue since i disconnected all the hoses and vented it to the atmosphere but still have the problem. I've scoured all corners of the internet for a definitive answer, the dealer wants 100 bucks to diagnose it. Haha that one link is some really intense stuff with the diagnosis machine... I've read the first link there and think i've ruled out clogged or kinked hoses. My car is a 1996 Subaru Legacy L Wagon

Hi folks, i've been around on a few different forums and haven't had much luck yet so i'm gonna give USMB a shot. I've had this problem for 2 years ever since I bought the car, and recently decided to try to tackle it again. Basically i can't fill gas, the pump keeps clicking off. It's just a real PITA. I'm not throwing ANY CELs. I know the possibilities are either the vent valve in the gas tank is not opening, or the hose to the charcoal canister is clogged. I've read it could be the pressure control solenoid which regulates the pressure in the fuel tank (not the purge solenoid), but I don't think that solenoid serves any purpose when the car is not powered on. Last night I removed all three hoses from the charcoal canister, and drove to the gas station. 1) I expected to get a CEL, and i didn't. I know the light works. Any ideas of this? I know sometimes the ECM needs to detect a fault on a couple of trips, i turned the car on and off two or three times before i got to the gas station. 2) I still couldn't fill up, which indicates that it's not a issue with the canister or anything beyond the "Fuel Tank" port of the canister since i was venting directly to the atmosphere 3) Does this indicate the vent valve in the fuel tank is bad? 4) Would a bad solenoid affect the car while it's not on (and no CELs anyway)? Maybe stuck in a closed position? Lastly, I found one of the hoses were broken that goes from the pressure control solenoid valve and Ts into the "Fuel Tank" hose. I tried putting a piece of fuel line tubing there but it didn't make any difference. The PCSV has three nozzles on it, one that goes towards the "Fuel Tank" hose, one that pulls air in from the atmosphere, and one that comes from the shut-off valve all the way at the top of the filler neck. What is the purpose of the shut-off valve? Thanks,