Trying to post this in the correct forum to get some help. 2013 Dart Rallye Turbo. No idea why it's happening. Changed my spark plugs a few months ago, so I doubt that's the problem. Every time the car accelerates up to 2,500 RPMs the engine begins to shake, especially on an uphill incline. It shakes, sputters, and loses speed. I'm going to take it to a shop but I'd like some input on possible explanations. Thanks.