I need Help, 94 3.8L replaced head gaskets, new duel exhaust, 02 sensors. Now no spark. PIP signal good to ICM, ICM has power and good ground. No trigger to coil from ICM. Just got used ICM from ebay and same problem. All my test procedures still send me to a bad ICM. Could it be a coinsidence to have 2 bad (used) ICM's???? Does anyone have any ideas??