Do you have an AFR gauge ?
I upgraded from Stage 1.5 to Stage 2 last weekend and my AFR at idle is around 17 ... way too lean.
And my car behave like yours, so you may have the same issue.
I've asked AA to modify my tune, waiting for their feedback.
Last edited by EpicM3SC; 09-29-2012 at 03:43 AM.