If you have 12V at the coils, the most likely failure is with the coils. You can also check the spark plug wires for resistance/impendance. This is meaured in Ohms/Foot. The rule of thumb is less than 10,000 Ohms per Foot. However, I think that is the service limit and would look for much less than that.
To clarify, a 2 foot spark plug cable should test 20,000 Ohms and no higher.
If you are not getting spark at the spark plug, the coild pack is probably bad, since it is getting 12V, which leaves only the plug wires and plugs. You can check for spark at the plug by putting th e spark plug in its boot and sitting it somewhere on the block where the threads of the plugs touch meatl. That is to ground out the plug. Have someone turn it over while you watch the gap for a good blue spark. DO NOT HOLD THE PLUG WHILE DOING THIS IT WILL SHOCK YOU.
Sunday, October 9th, 2011 AT 2:28 PM