Quote Originally Posted by BillBoost37 View Post
First off.. yes the ICM mount plate is different on L26 to L67. Second.. you shouldn't need to add an ICM ground. There's one in your harness that connects to the end fo the block right by the ICM

The ICM bracket was replaced with the L67 bracket with the correct length bolts with it. The Additional ICM ground is long gone now. The misfire is a multicylinder with no preference to a specific cylinder. It comes and goes so fast. It will go weeks with out doing it and BOOM misfiring again. ICM/coils/plugs/wires all changed.