omega2128:
your purge valve is stucked open and it's drawing fuel vapour from gas tank, your engine is wrong rich, because of excess fuel.
on the charcoal canister, two valves will be there, purge valve and vent valve.
purge valve line will go into engine while vent valve will be short, just to vent filter gas vapour. mind you, your purge control valve may be on canister or on engine.
in short, check your charcoal canister, if purge or vent is written there.
you need to change your purge valve before it will cause bigger damage
check and get back to me

MrMash:

I have traced the purge valve it leads back to the top cylinder. I have searched everywhere on the purge valve for the purge control verve but I can't find it. However I noticed the valve from the tank passed through a device before heading to the charcoal canister. Also there are 3 outlets on the canister : vent, purge and one that is not labeled but close to it there is a cable that goes to the ECM.

omega2128:

good, since you can locate purge valve. it will have wire connection. best thing is to Google Search it with your car model and year, for image and easy location. after removing it, blow through the end that goes into canister. air will pass through which ought not to be. functioning one should be closed and only control open by ECM. test new by this method