Hondata

Immobilizer** not multiplexer

If I can't get the k20a3 calibration to work, will using the k20a2 calibrations hurt the engine or the overall life and/or performance?

If so, is it possible to to change the a2 calibrations to match a3 calibrations?

No as long as it is properly tuned.

I'm from east coast, it sure where your located, but I'd figure I'd ask...do you know anyone that does a good tune/dyno in the Delaware, Maryland, Virginia area?

I couldn't tell you who does a better job than someone else. We have a complete list of our dealers/tuners on the Hondata website.