1992 Jaguar XJ6 Fuel Problem I think Please Help

Engine Mechanical problem
1992 Jaguar XJ6 6 cyl

Well the car turns over but wont start. I changed all new sparks and there is fuel going to the rail but it wont start. I tried using the sure start you spray into the air intake and still nothing. When I remove the gas cap air releases and fuel comes gurgling out. I dont know what to do cause fuel is going straight through the lines into the rail. There is full power and its cranking hard but wont start up. Please help with any suggestions on what it could be.