no it sholdt be erratic. it might idle high till its warm but not be eratic, u might have a vac leak or the fuel cal is off. check your afr in the software, you may have to add or remove fuel to get it near 14.7 under global settings, analog, fuel zero calibration. if its like 10.7 lower the fuel can number and hit apply, if its like 17 raise the number.