Hi all my U800 tracker wont start it cranks fine with plug leads off but when they are connected it kicks backwards and acts as if it is really advanced, if you move the crank / speed censor out a bit it almost starts from getting a slightly later signal, So i guess has anyone had a crank key sheer or is this a ecu problem i just don't want to jump straight to the ecu like so many do only to find it doesn't fix the problem, Thanks in advance for any help Bruce