k my 97 GT wont stay running, when you engage the fuel pump by turning the key it will start but it just dies a second later and if you try and start it without turning the key back and re engaging the fuel pump it wont start, any ideas? i just replaced the fuel filter today and put a bbk cold air intake on it monday night

 

actually i think it might be the key, cuz i was trying a duplicate when that happened but when i used my original it worked fine.. but now i lost the original ahh grr!!