I used to have my 2-step set at 4500. I had it like that for a few months. Recently i switched it to 2500. Well, ever since I lowered the rpms the 2-step is engaging at like 1800 and it will get stuck there and sound like it's misfiring, sputtering, low on power. Then I'll hit the throttle a few times and it finally gets unstuck and goes to 2500 where it should and it sounds perfect. No misfire, no sputtering, all normal. Any idea why this would happen? Other than that the car still runs exactly the same.