[NickD]

Poor acceleration? Can be a host of different problems,even water in the gas, fouled spark plugs, plugged injectors, or even the turbo that can very quickly tested with a manifold pressure gauge.

Ha, if you can't find these problems yourself, one big problem is finding a person that can. Performance problems can also be related to fuel economy problems, Cruze does had an instant mpg gauge, tells quite a bit. Can also have performance problems without codes. Ha, your engine is running okay, I ain't getting any codes.