While sitting for warm-up stage, my daughters' 2004 Rav4 "gallops". How come?
is check engine on sounds like throtle position sensor or map sensor,may want toalso check temp control sensor maby have a scan done autozone will do this for free,
It could be due to the kickdown from high to low idle. I have had similar things happen with other vehicles. Have the codes read and see if any stored codes are there that have not tripped the Check Engine light on.