I and leaning towards having put some bad fuel in the car from the pump. Perhaps some water was in there?
The problem was very bad ~150km after filling up and throughout the remainder of that trip. 2 tanks of fuel later, the problem persists but is not as frequent or violent.
Water is heavier than gasoline so it may very well be. Water could be stabilizing near the pump during steady cruise conditions and moving away from the pump under boost conditions. If water is really in gasoline than it should also show the signs when parked and idling on the flat ground. This never happen to me so it's hard to be sure if this is really it.
You can drain your tank by redirecting return line into a gasoline canister.
I have not however tried going back to stock soils and plugs yet as I'm on a COP setup.
Will the loss of spark send AFR into lean? logically it should not (should be oposite) but anyone correct me if i'm wrong
