Originally Posted by Watt-maker

Normal. The reason for this is, the O2 sensors have not warmed up yet therefore they cannot send a signal (or at least a proper signal) to the ECM. Some call this "open loop" meaning the ECM is using a pre-programmed map (timing, fuel, IAC, ect) to follow (usually rich burning) until it receives a signal from the O2s and/or coolant temp. sensor. Also, the combustion chamber, cats, trans, is still cold so nothing is operating where it is most efficient. Just about every EFI vehicle I can think of does this. Some worse than others.