i am looking for the revision that applies to the square block coil on the 4G63 engine.we have replaced ignitors,coils and still have a very weak orange spark.Have checked engine grounds and such prior to replacing any ignition parts.It seems that the only way to increase the spark is to run a hot straight off the battery to the coil.supposedly a psb was put out on this by mits but I cant find it.Thanks for any help.