Originally Posted by PMJ
Thanks Ted! I'll be trying that out ASAP!
what Ted said might work, I didn't go through the entire progress you had on this but did you try to disable transient fueling just for the hell of it? This is assuming the lean condition is causing the spike and not the other way around.
but yes even the throttle body will be happier if the bypass valve slows down, you can also alter the throttle opening rate.
Right I never asked you this but do you have spark smoothing turned off by any chance?