That can't happen unless you have a really slow responding IPR. The
PCM is able to correct idle speed and adapt to too low or high
ICP to maintain a good idle.
The key is to KEEP the
PCM and IPR from being able to "catch up" with the desired
ICP.
The state of the HPO system is going to determine how fast the lope occurs.....and it's not just a choppy idle like other folks' "lope tunes". It's an actual ROMP.