Hello, I have a problem with my 97 HB. Background: stock, w/at, failed smog due to high CO. Replaced MAP sensor, O2 sensors, temp sensor, TPS sensor and it just passed the second time. Now has a funny idle when warm. It will idle fine for a while then has a "burble" and returns to normal but will keep doing this. I've checked for vacuum leaks by spraying carb cleaner around hoses with no change. Any suggestions or answers would be appreciated. Thanks, Clark.