2000 2.5RS BRP
You might have a bad iac to begin with. Worth a thought.ImprezaRSC what changes did you actually make to the IAC to make it jerky?
I have an aussie 2003 Outback (ej251, manual) that has terrible on/off throttle jerk and I was hoping to try fix it a bit with the bluessm (just waiting for the ecu to be made compatible and I should be right to go i a couple of days).
You can map two different iac tables. One related to throttle opening and the other related to engine rpm. Both are single column tables, labeled as a percentge of opening. I tried a steady increase in the numbers and it just didn't like it. Nice idea, but it just didn't work.
There are more tables available for IAC function. I just couldn't cheat with these.