Lack of power and stalling - no codes??
 

For the past few weeks I have noticed my X having a lack of power/ response when tapping the gas - you really have to push the pedal hard to get it to take off. And a few times I have had it actually stall when shifting it from Park to either D or R. It seems to idle fine, but I have had the RPMs drop to like 400 or lower when shifting it into gear. However, it has yet to throw a code on the computer.

Any ideas on what this could be???

Has the engine control unit been programmed for ms54 idle dip?

I had a similar problem and other members had it too. Have you tried a throttle reset?

Not that I am aware of - any additional info on this??

Yes, I have done a throttle reset, but that did not seem to help.