I changed my spark plugs to platinum tipped jobbies,when i came to the front two,deep ones,yes the obvious happened pulled the f..kin, leed out from the boot.so bought new leeds for 60 bones,put them on and she was missing more then ever.checked the spark from the coil pack and on two cylinders ,one had a poor spark and other had F.All.Does this mean a new coil pack ,if so how much should i pay and from where.how easy is it to diy.Appreciate any replys out there... &|