H E L P!! 91 CIVIC WILL TURN OVER but will not start, installed a new distrib.fuel pressure regulater.main relay.new fuel injectors,new fuel filter.I get a code #16 .the book says fuel injectors but I replaced them both. Don't know what to do but replace ECU?? ALL help is useful. So if you can think of anything no matter how crazy I am ALL ears thanks, mike