Originally Posted by DMM
You should be fine at 18* if your fueling is spot on (fuel press, injectors, etc.). While this does not sound like typical "burst knock" conditions, there is a possibility that this could be what is happening.
I would try going into "Spark"--->"Retard" and under "Burst knock" select the "Enable Delta Cylinder Air" and desensitize the sensors a tad bit to see if this helps. I had to do this on the V and the truck, but I have the knock sensors in the valley...and I was having issue's like this at around 2k RPM.
Even though you are pretty safe at 11.0-11.3, I would add a little more fuel JIC you have a single fuel injector that's lagging behind the rest.
This is the PITA stuff that could be caused by any number of things and it gets really frustrating. Good luck!
Good suggestions guys.
Burst spark I've always zeroed out as I know it always used to introduce KR even just blipping the throttle from idle. I'll desensitize the sensors a bit but...
Having said that the KR is now gone. I'm effing confused.
2 things that changed:
1. I refueled
2. I upped my boost a pump level from 20 to 30% just on the off chance that pressure is dropping albeit AFRs are good
Low and behold it seems to have disappeared in those cells so it was/is either a) bad gas b) fuel pressure drop but AFRs were perfect (maybe this is the small delay factor) or maybe I just was running borderline.
Could have been a fluke also but I did 4 solid pulls and 0 KR across the board.
Now not sure what to do. Guess I'll do more pulls and see if this comes back.
Thank you though.