That 2400 RPM is out on the road driving around the block?
Parked in the garage and revving the engine the RPM is limited by the computer; It should be higher than 2400 more like 3000 ~ 3800 RPM, just trying to be clear on our understanding.
Wish I could be more helpful. Other than the RPM limit the car runs good; no lumpy idly or acceleration?
What kind of car is this? Limited with automatic transmission or standard transmission, or is it a SRT6 with the supercharger?