30-03-12, 07:34 PM
not too good on electrics plus its been a long week....are you saying that both multimeters are giving readings between 4.5 and 5.0....if thats the case i would say there pretty close and as you say bin time,as regards both coils failing together,could one faulty coil put extra load on the other OR is there one faulty coil affecting the performance of the other.......the improved performance when blocking the air supply,i think ,is a bit of a red herring,but if the coils have failed this could well be your problem 
One, is never going to be enough.....