when I try to start my 40 the starter sticks at times and I can't stop it unless I turn the key on and off a few times, so I got a brand new starter and an ignition switch and it still does it now and then. I've checked several grounds and they seemed to be fine. I've replaced almost everything I can think of, any ideas? I have a D.U.I. distributer on this 78 FJ40.