You may have a bad ignition module. You can check it by removing the affected ignition coil, also remove the fuel injector fuse. Connect a test lamp across the two terminals on the ignition module. Take a look at the test light while you crank the engine over. The light should be flashing while you crank it. If it does not you need to replace the module. The only other thing I can think of would be the the ICM or the Crank sensor. Some good [http://pontiacbonnevilleclub.com/forum/viewtopic.php?f=19&t=18185|information on this] Check it out and see if that will help. Good Luck to you.