With Eco off my sport has a nice bog/hesitation when accelerating. Doesn't matter if ac is on or not. I'm also using shell from the same station I've always used for years. The 2.0 is still pretty new so I don't know how much info anyone has come up with. My cruze turbo had the same kind of issue and turned out to be the sparkplug gap was too small from the factory. Please give me things to check before I bring it in to the dealer.
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