I just acquired a 1992 civic hatch with a b18c swapped in. It is using a p28 ecu that looks stock to me, although the previous owner said that the car had been tuned. It is idling around 2000 rpm. I'm new to hondas, but not new to the auto world in general, and I'm looking for a few suggestions on where to start looking for the high idle problem. Thanks for any advice.