I have a 2006 Honda civic Ex 4Dr with 204,000 miles on it. I had the charcoal canister replaced along with two sensors back there and the purge valve replaced as well. A week later, P0496 came up and anytime I fill my car up with any amount of gas my car won't start up whatsoever. It cranks, I have power, and if it does start... My car will shake, I can see my RPM's dropping off, and then the engine starts shutting down. What I'll do is press on the gas pedal while starting the car, then keep the RPM's around 1,000 then after a min or two the car will start fine and yes, drive perfectly.