Recently purchased 1997 mustang gt as is. No keys or tumbler. Got key and tumbler from wrecking yard. Starts then immediately shuts dow.n. Anti theft light blinks continually. Any ideas that wont cost me a kidney.
Find a key shop that can program the key, you did get a 'chip' key right?
they have to have the car to program the key, where did you get the key and tumbler?