I jsut got done pulling the plenum and repairing my gaskets. anyway i have it all together and i noticed that it wasnt running great. looked at the engine and notice arcing on one of the injection coils on the passenger side. i pulled the coil and moved it to a different cylinder. then it started to arc from that cylinder. will a bad coil do this? or would missing a ground make it do this? i need to know if i need to buy a new coil. thanks