I have a 2013 ATS that I've recently noticed performance issues with. Essentially the car will shudder and groan a bit when the accelerator is pushed at speeds around 40 MPH. Same happens when the car starts to go up an incline in the road.
Almost feels like the car is about to stall. Or that it needs to down shift but can't.
Normally I use 91 octane fuel but a family member did recently fill the take with 87. I'm running 91 without ethanol in the tank now but it's not helping.
Any ideas what the issue could be? Turbo going out?
Almost feels like the car is about to stall. Or that it needs to down shift but can't.
Normally I use 91 octane fuel but a family member did recently fill the take with 87. I'm running 91 without ethanol in the tank now but it's not helping.
Any ideas what the issue could be? Turbo going out?