I have inherited and 87 milano with a locking gas cap. Don't know much about the car, but it is **** fun to drive. Now it is time to put gas in the car standing at the pump and I can't get the gas cap unlocked. I don't know if it is broken or if I am using the wrong key. I was using the ignition key I think that is the right one. If indeed it is broken does anybody have any suggestions to get it off?