Left my CB radio on for two weeks and ran my battery dead. Put a charge back in the battery and now have no fire at the plugs. It's a big chevy with fast fuel injection and a MSD 6AL ign. Can the battery going dead real slow kill the MSD or erase the info in the fast injection?ive had dead batteries before and always charged and go. The hand held with the fast shows 11.7 V and no error codes. Motor turns over real fast, just no spark at the plug. I've got to make it to Adventure Off Road Park this weekend!