BPB - I also have had this issue intermittently approx every month or two. I have a Canadian 2012 manual chevy cruze 1.8 with no A/C. At first it sounded/felt like a cooling fan imbalance with moderate vibration and noise, or like an AIR pump coming on with a lot of vibration. I just had it happen again today after driving to a coffee shop it lasts about a minute then goes away. I seem to recall it lasting a bit longer when i first got the car new. I will definitely report it to my dealer to document it as I am still within my 5 / 100k warranty. I am almost 4 years and approx 60,000 km. I recall visually seeing the cooling fan was not operating (and no reason for it to be as engine was not hot) and its not a California car so no AIR pump (if they still have those) so a flywheel issue seems possible however puzzling how it happens only intermittently.
Morning all, I have a 2011 Cruze ls manual transmission with 65,000 miles on it. The other day my engine stared running rough with a vibration at a stop light. Then takes off rough. Once I get to about 12rpm it seems to go away but can still feel it as im driving down the road. Could this be bad gas? Thank you for the help in advance.