[Steve850]

Do you know if it only adjusts fuel in open loop or open and closed loop? At what point does it go into closed loop? I haven't seen a temp sensor but may have missed it. I'm just looking for a way to slightly richen in up some across the entire rev range. I've done a little studying and it seems adding any resistance at all to the oxygen sensor will make it leaner. I opened the exhaust up some and it is noticeably quicker in the 55-60 mph area.