I got a trouble code today..i took it to have it read..and came up running leanon two banks....this Only after i got Gas too...

Now i removed my CAI the other day. and put HALF the stock air system back on(just the tube/box...not that thing in the fenderwell)

i also noticed im Running cooler (according to my temp guage) then normal since the switch

..would that be my issue and why its throwing a CEL?

btw this is a 98 LS integra

 

you, as well as all of us need more info before we can attempt to help you. although, i can tell you that swapping an intake (regardless of the type/size of it) will not cause your car to run lean enough to throw codes. your throttle body's the same size regardless, and it's letting in the same amount of air as it was when you had the cai on it... the aftermarket cai just makes it a more direct injection than the stock system, as well as cooling it (apparently not in your case) to make it run a little better & cooler. you probably got an issue with your fuel system or a sensor.