I am in need of help and looking for suggestions on my misfire issues. I have had this vehicle for many years and it has 200,000 miles on it. 2008 Equinox 3.4 engine. Within the last year I had misfire in two different cylinders. I replace the spark plugs and wires and eventually the coil pack which took care of that error code. Now I’m getting an evap error code p0449 and P0446. And from what I read, wouldn’t cause my issues? The car misfires and loses power under light to moderate load. I Don’t know if it’s related or not but, the little metal flap under the gas cap(fuel nozzle hole) must have broke off and fell down the neck, which restricts fuel flow into the tank. Takes 5 mins to fill the tank. It’s still a great car, I’m just at a loss. Any suggestions would be greatly appreciated! Thank you