when i try to start my 302, it seems like it turns about one revolution and then the battery cuts out (can tell that because the door lights go off and on) and it does it for 10 seconds and then it will fire. could this be my starter relay? also, my car will only run with the motor fully choked (manual choke carb)!!! it also idles rough, could this be out of time or gas/air mixure off? help appreciated.