Thread: 08 gp runs and shifts odd

I have a 2008 gp with 58k, Its kinda hard explaining what my car is doing but ill tr my best.

It idles and sounds fine. When I drive it feels like the car is pulling a heavy load. If I take off fairly fast, the rps get to about 3k and the car takes off like its supercharged which it is not. when I go up a hill, I give it more gas and the rps go down, it doesn't shift till i am giving it atleast 1/2 throttle. It also feel like it surges or something not alot but its constant. It still feels like this no matter what gear i put it in but mostly feel this going up hills. The best i can describe this is when my 2 cycle 2 cylinder snowmobile is fouling a plug and it get a spark here and there to the fouled plug. Also in the past, a few times the car would feel like the exaust was blocked and very sluggish and the exaust was noticably louder. Ofcoarse the dealer found nothing! That would come and go not to often. Any ideas of what could be the issue? No engine service light has ever come on.
John

thanks, would the dealer be able to test the module to see if its ok or not? Its still under warranty.

Because they say there is nothing wrong with it. They say the same thing about it shaking when I give it gas.. "its the tires" 3 different pairs of tires are going to do the exact same thing?

Since yours is an 08, I'd try removing and cleaning the throttle body, then clean the MAF and see what you get. If the TB is dirty then it may be messing w/ your DBW system.