My wife's 2005 Pacifica, surges high and low RPM at around 2900-3000 RPM. It's a 3.5 Base Engine with 180,000 miles on it.
It threw up an DTC #P0129 Baro Pressure too low So, I replaced the MAP Sensor. And cleared the code.
Still the same problem. No error codes, Everything looks good on a Elite CP9690 reader.
Any ideas????

Thanks, Pat

Stop the Presses!! It turns out, it's supposed to do that when in Park or Neutral. Everything is fine now. I still don't know what the Wife was complaining about! (grin)