Thanks, I did put a brand new cap on, no diff, chgd the vent valve solenoid, no diff. With the hose from the cannister to the vent valve solenoid disconnected it kept the CEL on but never built any pressure for weeks. Put a new vent valve solenoid on and 3 days later pressure is back and CEL is on...
I disconnected the wire at the purge solenoid and it has 12 volts going to it. I then disconnected the line from the canister and it blows clear, then the other line from the valve to the throttle body and it too is clear.
with the car running or not running there is no vaccum at either end of the valve and you cant blow thru it.
I alo broke the rubber connection at the throttle body and the end of the valve. Are these dealer items or jukyard or regular auto parts stores ??