whydoesthegasgoslowinmy2007crownvic

P071 cars have always been abused check the accelerator pedal make sure nothing is loose or bent. Scan the vehicle for codes too local auto stores don't charge usually charge a fee. throttlr body could be dirty those cars idled for hours and hours none stop.

Tom Good guess, Gasoline kicked back on grown=ground?

Yeah, if I gathered correctly, the car can only be filled with gas very slow or it will spit back up the tube and on the ground? I agree with Tom, canister vent is blocked or vent valve is stuck shut.