[DrVirz]

Another update, got around to checking plug gaps. They were about 0.029 (0.74mm). I opened them up to 0.8mm which I believe is stock, still no difference.

I tested the coils with one of those cheap coil testers (link below). I'm sure they are far from accurate however all I really wanted to test was consistency across all coils. There were definitely some discrepancies, with coils sparking between 2.5kV to 3.5 kV. Again, I'm sure this tool is far from accurate however it at least shows some discrepancies.

At this point I'm thinking of throwing new coils at it. On the hunt for a set of 8 eldor coils. I doubt this is the issue however relatively inexpensive and probably needed after 100km anyway.

https://www.repco.com.au/tools-equipment/automotive-tools/engine-drivetrain/toledo-hd-spark-plug-firing-tester-302167/p/A9485434?rgfeed=true&cid=google-shopping&utm_source=google&utm_medium=cpc&region_i d=100009&gad_source=1&gclid=CjwKCAiA1fqrBhA1EiwAMU 5m_0lnHvnbFbjsajqwO-5Tk-DlD5eSnX6wWsYYaNh54rJu687TGfmgUBoCqIoQAvD_BwE