Hopefully moving across the country Monday and can keep the car at the dealer until Monday. Have researched as much as I can with this and am hoping someone can help.
Backstory: In June, my car was leaking coolant and, long story short, needed the entire turbocharger replaced. The check engine light was still on, and I was told that was an issue with the light, not the car. Well, I got back and drove it 10 hours up to Mass (I’m in Ohio) in July, and it started having issues.
Issues: When starting the car after a long period of time or after it rains (this is something I’ve noticed), the idle will be rough. Rough like shaking back and forth for about a minute rough. Along with this will sometimes come an inability to accelerate the car. If I wait, this will usually pass. It has also come with a burning hair smell that sometimes smells a little more like gasoline. Once, I was parked on a Hill and I had the same issue and “Hill Start Assist” came on and made it hard to switch out, a couple days later this came back on when I was not on a hill. (Also possibly worth noting that all of the issues started up after I was lightly rear ended, but I think these are unconnected).
Tried to Fix It: Took it into the dealer in Mass, dealer diagnosed it with a bad catalytic converter and replaced it. Did pressure tests, etc. after the new converter was in, everything checks out and the check engine light is now off.
Same Issues But New: When I came back from Mass, thinking everything was fixed, I had the same rough idle and no acceleration; then when I was on the highway, I had three separate instances of the car not accelerating past 50mph.
Now: Car is being driven by dealership and other than a rough idle in the morning, they can’t find anything wrong. They said they will check on whatever I ask for. My biggest worry (which is something that was mentioned by dealer in Mass) is that I have a cracked head gasket that isn’t failing pressure tests because it is running fine when warm but not running properly when shifting from cold to hot (this would explain the rain issue and it sitting for a while).
If anyone has any suggestions, please please let me know. I really don’t want to have to sell this car, etc. but they don’t seem to believe anything is wrong.