12 is not a fault code...it's a seperator code.
If you have an '89 and you lost spark...take the air cleaner lid off and have someone turn it over...do the injectors not spray either? Then replace the 7 pin ignition module in the distributor. You'll need a 5.5mm socket for the module screws.
__________________
Please click on ACCEPT if I've helped...it's how we get paid for our time answering questions-THANKS-you can still write back after you ACCEPT.
