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I bought a new key for my 99. Cougar on e bay, and i programd it at home by truning it 4 times i key fob from 1 to 2 and then pushing any button, central locking and remote control are working but car wont start with new key.. Any ideas?
 

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You have to have 2 working keys already if you plan to program any more yourself. If you only have one, you must have a device that will interface with your computer to program more keys, whether that’s a FORScan device or a dealership visit.

Once you have 2 working keys, you can make all you want beyond that for free.
 

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FORSCAN will allow you to delete all existing keys and reprogram the two you have.
 

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Good luck. FORSCAN is powerful but isn't terribly user friendly. If that doesn't work, the simplest solution will probably be to replace the PCM and RFID with a matched set.
 
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