when I check the coils by holding the coil at the tip, two are a bit wobbly but are held in place at the base by the 10 mil nut which is tightened up.
its a bit like it is broken or something halfway down from the tip.
does this mean they are faulty or affect the running of the engine ? anyone ?

 

Check the stud hasn't broken on the bracket.....the coil function has nothing to do with the mounting bolt