I have an issue where my car stumbles off idle. If I put the car in neutral and rev it, it stumbles when I rev it under ~2k rpm. If I roll into the throttle it is fine.
Car is a turbo 6 clyinder, with an E67, and probably a very oversized throttle body. I tried adding timing, removing timing, adding fuel, removing fuel. The stumble wont go away and doesnt noticeably change with anything I've tried. I don't know what other thing to try to adjust. Any ideas what I can try? As a last resort I could increase the idle rpm to maybe 1200, but that feels bad.
idle revs more timing.hpl
L28SDSpark.hpt