Vehicle suffers loss of power when pulling out from a dead stop into traffic and may hesitate several seconds before regaining acceleration. when it does this,it will then at times continue revving the engine to extreme rpms and will not reduce rpms to the normal as it should, placing the vehicle in neutral will allow the rpms to lower and placing the vehicle into gear again it will drive normal. there are no failures being shown in the computer diagnostics when checked by dealer, and nothing is failing. no set time frame or pattern related to this issue, may do it several times in a row and then not for several hundred miles after. there is no warning or feel that this is about to happen .