After some ideas for narrowing down a bad misfire my engine developed today.
Was running ok this morning, but when I started it this arvo it sounded like it was dropping back to 3 cylinders now and then. Drove it home and the misfire seemed to cleared at first, then it got worse and stalled a few times. Was lucky to make it back home, sounded like it was running on 2 cylinders.
Checked the intercooler pipes and none have blown off.
Suspect dud coilpacks, so pulled them and the sparkplugs out. Coilpacks look fine with no visible cracking. Plugs are very very black, but maybe thats just from dropping a few cylinders.
Any way to test the coilpacks? or any other thing to check?