Spark from half the coil only?

[coocoobird]

When there is spark only going to half the cylinders.. is that usually the coil pack or the ign.module? i believe it was 1 3 5 was not firing..

[rhandwor]

I have had to replace more coil packs than modules for this problem. Using an ohm meter check your plug wires first. After unbolting your coil use an ohm meter and check the olms. Mark this coil and remove the other unit. If the ohms aren't the same your have found the problem usually one part won't ohm on the bad one. I've found a yard that sells them for $3.00 a piece and $10.00 for the module and coils.