Having problems with your Ford Mustang ?
How do you install a performance chip on an 09 mustang?
What kind of "chip"? A true performance programmer plugs into the vehicle's OBD-II port under the dash. Some cheap "chips" alter the intake air temperature circuit, which I would advise you stay away from, they're not worth it.
Repair Help & Product Troubleshooting for Ford Mustang
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