Quote:
Originally Posted by Ultramaroon
Are you absolutely 100% sure that those plugs at 5 and 6 are firing? Can you get at the power for the igniters to unplug them while the engine's running? If it runs worse, or dies, then that cylinder was firing.
You can also remove the igniter and test it using a new plug and a ground strap. Testing is key. Think of how much time and effort went to replacing all that perfectly good shit.
I've dealt with simultaneous seemingly-independent failures. It's rare but it happens. I've also dealt with a couple engines that were consistently wrong in how they reported misfires.
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Well, I swapped both the plug and ignition coils forward a cylinder, so 6-->4, 4-->2, and 2-->6 and it is still showing misfires on 5 and 6. Plugs looked fine themselves. I only did the left bank though, I could try the right bank but there is more shit to remove to get to the plugs. The only plugs for the coils are right on top of them, and being a boxer, I don't really want to stick my head between the engine and frame rails. Plus, I need to remove the battery to get to one side, the air intake to get to the other.
Yeah, there is a possibility that it is reporting misfires incorrectly. It definitely feels like a misfire, but it could be reporting which cylinders are misfiring incorrectly.