2007 F 150 4.6L.Will not start
Was out of town.Got in truck.Turned key to start.It started cranking but would not start.Let go of key and it kept cranking.It continued to crank until I turned the key off.Called garage and they came and installed new fpdm module.Fired up and away she went.Drove home 120km.No problem.The next morning I went out .Turned key to start and exact same trouble again.Phoned garage and they said check plug.Looked at the plug but it looks good..What would be problem?