1999 ford mustang v6February 27, 2015If I change computer do I need to reprogram new computer? Share Tweet Pinterest Keywords:computermustang 1 thought on “1999 ford mustang v6” Freeautomechanic February 27, 2015 at 2:51 pm Yeah it needs to be flashed to match your vehicle. We sell them where I work and only way they work is to get all the car info . year make model engine vin ect and then the computer manufacturer flashes the computer and sends them to us usually the price of the computer plus $65.00, suppose it varies on where you get it from.but thats the only way it will work far as I know.. The computer needs to match to you CAR IGNITION KEY, this is an issue that can only be solved by a re-flash. That is the problem with the Anti Theft system, if the key does not match the code in the EEC the car wont start. Comments are closed.