Fuel delivery

Not sure about the 2000, but had a similar problem with a 2010, which caused the engine to run erratically. It was the evap system. on the 2010 the evap system runs a test to make sure fumes from the tank are not escaping into the air. It does this by pulling a vacuum on the system while running. If the purge valve does not shut off, and continues to pull a vacuum, the results are what you are seeing. My owners manual states to never fill the tank past the first automatic click-off. Of curse I never did that, not reading the manual. The result was raw gasoline being pumped into the charcoal canister, then into the vacuum pump, ruining it. If the vacuum gets too great, the fuel tank will collapse like a aluminum beer can being sucked on. You may want to visually check your fuel tank to see if it was damaged.