It appears I cannot get to closed loop. I unplugged the WOT and I'm still getting a dwell reading of about 53.8 on the dwell meter (4 cylinder). The RPM ran about 1200 but once I plugged the WOT back in the RPM settled back down to about 800. I unplugged the CO2 and got the same reading. Plugged it back in and got the same reading. The CO2 is new. Perhaps the wire on the CO2 is bad?