[DSSR]

I have a 2001 996 (911 Carrera) non turbo car. I bought the car at auction and I have no history on it. It has 175,000 miles and runs and drives great. Everything works except I cant put gas in. I have replaced the fuel cap, fuel fill vent valve, and purge valve. All either OE or Pelican parts. Still spits fuel back out filler neck after pumping
a few seconds. I Tried disconnecting the 2 large tubes from the charcoal canister and the problem persists. I tried disconnecting the 2 small rubes from the fuel vent valve and I could get gas in but the pump shuts off every couple of seconds. I can pour gas from a can slowly and I can get fuel in the tank. I know its a venting issue but cant resolve it. Any help is appreciated. I need to get it fixed and pass emission test so that I can sell it.
Thanks
David