well my rx7 will idle fine as long as no electricals are on. when my hedlights get turnd on my idle drops almost to 0. or when my sub hits or any electrical thing is turnd on my idle drops my volts are staying at about 14 like they should i cant figure it out. any help or ideas thanks

 

Try checking the Idle Air Control valve, or BAC. Not sure what series 7 you have but you are basically looking for the valve that supplies air for idle and load. If you are missing it or it isn't working correctly, your car will die with electrical loads or idle weird... Usually located on the Intake Manifold....