[TaKid455]

GO to basics. While it will be touch to see now since you drove it, what did the plugs look like? Is 1 cylinder spark/ fuel , ect, not happy? This kit only has 1 O2 sensor? If so switch it to the otherside. This will tell if 1 bank is acting up. You may not feel it.

Other idea, and its semi far out, is exhaust scavenging. You could be scavenging too much and pulling the incoming charge out of the chamber directly into the exhaust resulting in a lean condition. Thus why its is adding fuel.

Is your ECU setup to turn CL off after a given TPS % or is it CL all the time?

You said this was only in first gear?

PS .. this is what happens when you drive by w/o stopping to say Hi. You stay forever 12's.