I'm having the same problem many are having on my 97 Infiniti QX4. P1441 and P 1447. I've replace my EVAP Canister and blew the charcoal out of the lines. The vehicle seems to idle fine but its sounds rough and shakes more than usual. Had the dealership diagnose it and they said the EVAP canister purge volume control valve wasn't working. Only problem is, I can't find one anywhere! Anyone know where I can buy a EVAP canister purge volume control valve online? Here's a picture of it just in case.
Any help is Uberly appreciated!