Ford Repair: 1987 ford thunder bird, vacuum line, thunder bird

Question
i have an 87 thunder bird lx i just replaced the sparkplugs and now it starts but dies immediatly after i start it i need an answer asap its my only vehicle please help.

Answer
Hey there there may be a chance you pulled of an important vacuum line, if theis thing was running fine befor hand then there is something you missed. Or there is a chance that you installed the wrong plugs. let me know what happens. good luck
Chris P