Problem with my 2001 Chevy Blazer 4.3. Check Engine code P0446. Changed a vent valve on intake, but did not fix issue.
I had the trouble code pulled from my blazer which was P0446, before i tried to attempt to fix this issue i was out and needed fuel, but when i went to put fuel in the blazer i started to pump the fuel into the tank and the pump would only stay on for about 3 to 5 seconds and shut off.
I tried 3 different fueling stations to make sure is wasn't a gas pump issue. I have filled this truck up 100 times or better without any issues until today. I also noticed a lot of pressure being released from the fuel tank when i remove the fuel cap. Any help would be greatly appreciated. I suspect some type of venting problem, but not sure.
Answer: Well, first off, code P0446 does not refer to the EVAP purge valve. This is the valve on the engine that you replaced. This code is for the vent solenoid. That is in the rear of the truck, under the spare tire. This would part being bad would also explain the problem you are having filling the gas tank. When this valve sticks, is does not vent, so the gas station pump feels the back pressure and shuts off. I would go ahead and replace that valve. It is only about $15 at most large national parts stores.