Yes when you come up to a stoplight and take your foot off of the gas pedal if the a/c or heat is OFF you can still feel it a little bit but it's worse when there on. Also when the a/c or heat is ON and you accelerate from a stop sign or stop light the van hesitates a bit. The battery is about 1 week old. I have also had it scanned and there are no codes and no check engine lights. Not sure about the maintenance it's been this way since i bought the van about 1 year ago. I will check out the the Idle Air Control valve and update if that fixes the problem or not.