Hello. I am new to having a car with an electronic throttle. My former car was a 2002 cavalier z24. I now have the malibu ltz and I do love it. However I noticed that once I am over 40mph I have to push down the accelerator a lot harder to get it to respond. I can actually push it some and it does not respond at all. Once it does respond it is all of a sudden and it really goes. Is this normal for this type of throttle or is my car messed up? I haven't had any other problems with it. This issue is exceptionally bad if I am going uphill. maybe the transmission??