Hello everyone Im new to hondaswap and just thought I would give it a try. I bought a '99 Civic LX about 5 months ago. Great car!!! Just has a few problems that my limited mechanical ability can handle. whoever had it before me removed the stock catalytic converter replacing it with a straight pipe. Illegal of course! I runs good but I guess this is a two O2 sensor system and only one is present. The car will idle up and down very hard at about 800-1000 RPMs. Any ideas. And the acceleration and decceleration is very jerky. Thanks for you help.