A new member not for sure how forum works completely yet, well have2000 mustang gt 4.6 no upgrades yet.about 130,000 miles run good.Except have 2 problem have not solved first one is when drive the car a few miles, come back to start then a loud horn sound then go dead also makes this sound briefly driving on highway also. Some one on forum said need to change IAC, changed it still make the horn sound then engine stop. Second problem when gas level get lower than half tank check engine light comes on, car run ok. Disconnect negative battery and refit gas cap check engine light stay off.Help somebody

 

 

lol...