which is best for a 97 mustang ?

 

any of them, as long as it works. or go to autozone and have them read your codes for free.

 

great thanks did have autozone do that and they said all that came up befor the no start problems was a running rich code meaning lean i guess .but that it was not a problem this car has a mod chip superchip something and has the vortech s trim and nos set up already so alot of stuff and will not start the starter will not engage like the anti theft is working in the background or something ..so i want to use a code machine but will it work on a car that has mods to the comp.? rogerwilco out