For the last 2 years on and off I kept smelling gas fumes under the hood and I couldn't find the cause. Recently I disconnected the gas charcoal canister altogether and capped the lines going back to the gas tank and the lines going to the emmission system. Surprisingly no code showed up on the consult but I did notice after emptying the tank and going to fill up The pressure built up in the gas tank was tremendous!

So now I got some 3" pvc pipe and filled a 4 ft section with activated charcoal and connected the gas tank pressure release hose to this set up and added a exit hose and now I have no pressure build up and no more gas fumes under the hood coming into the cabin!

I still haven't figured out why the evaporator canister wasn't working and I also replaced it a year ago. Oh well, at least I fixed the problem. I guess I'll have to refill the canister with new charcoal on occasion.

Has anyone ever had this problem??

 

pics???...

 

im interested to see this........

 

the code WILL come back... go on a nice l ong drive and it will come back....

 

yea ide be suprised if no code shows up...

 

I occasionally get that smell on cold days when the car isn't warmed up. Oh well, though, doesn't last long and it isn't strong so it doesn't bother me.

 

No more pressure build up? Wouldnt that be equivilent to having a bad leaky gas cap??

 

The EVAP is only supposed to be in operation long enough for gasses to be purged, not full time. That's why it's controlled electronically via the purge volume control valve.

 

Are you saying the one way pressure valve at the gas tank won't open on its own when excess pressure builds up in the tank?

I was wondering if this valve is controlled by engine vacuum. Maybe I should replace the stock valve with a simple pressure operated valve.

Does anyone know exactly how the stock valve works?