Limp mode or something else?

[tchertel]

I wanted to see if anyone else has experienced this. I am not sure if this is "limp mode" or something else. When I read on this forum about members' cars in limp mode it seems like they cannot get the car over 3000 RPMs. I am experiencing something a little different. When my car freaks out, I can still run through the entire RPM range with no issues however it feels like I have an extremely weak 4-cylinder under the hood. Also, I do not get any check engine lights and the idle RPMs will jump to 1500. If I turn off the car, wait about 15 seconds and start it again, the issue goes away. My tuner stated it could be transmission storing a code and suggested I have the transmission scanned, I plan to do this no matter what however this, what I call, limp mode only happens with his tune and it is not consistent when it happens. If I install the Stillen tune back in the car, this issue does not occur at all.

Has anyone else seen this? I do have the 7AT trans in this car.