So since I've bought the car (used with 13k miles 6 months ago) I've been having these on again off again issues with performance. It will drive great for a matter of weeks, then all of a sudden it will feel as though someone is applying breaks while I'm trying to drive... As if the hulk was clamping down on my drive shaft.
When this happens, I notice that it will be harder to get a smooth shift. When I'll go in 3rd, it'll kind of jump forward as if someone just let off the breaks. The whole transmission just starts feeling really stiff.
I'll also notice that the exhaust will start sounding almost louder and will start popping more as well.
There's been a few random things in the past that have coincided with it "going away". I had the dealership put on a new IC > TB hose, since the old one was leaking oil.
Recently, for whatever reason turning off traction control during my drive to work seemed to make it stop, but then once I got out of work it was back.
Between getting the intercooler hose replaced and when it came back, it seemed to start happening once it got hotter here in Chicago.
The dealership I have to take it to is 2 hours away and it's a big ordeal to drop it off there overnight to be looked at, and the issue is never present when I'm about to having them take a look (not to mention tracking down performance issues is difficult for them to begin with)
Anyone have any ideas? It's making owning this car more worrying than fun.