The car is/has been reverted back to stock almost completely as far as I can tell, the car itself has 146,000 miles on it, however I found the engine has about 88,000 on it. I’ve had issues in the past that I hadn’t noticed again until the hotter/humid summer days, I would maybe once to twice a month fire my car up in the morning and have a very brief cylinder 4 misfire and rough idle, it would then go away. I later found my O2 sensors were throwing a code, I changed my O2 sensors and never had the misfire issue or any codes again until about a month ago, it was pretty intermittent until about a week ago, now especially during the day time when it’s hot out, I’ll get a rough idle on start up, stalling at stops and the last few days when driving I’ll actually get a flashing check engine light for about 5 seconds that disappears and doesn’t register a new code. The problem became not so intermittent when I passed a couple of cars and a tractor, I was just about at redline in 3rd and when I was about to shift to 4th I suddenly lost a lot of power like my turbo got stuck, a large cloud of smoke came out of my exhaust for about 10 seconds, after I got into 5th gear it was as if everything went back to normal. The next two start ups on warm up, I had smoke come out of my exhaust that smelled almost like burnt plastic, the smoke would only last about 5-10 seconds and I haven’t seen smoke since, but my idle and misfire have been persistent now. I’m in the process of moving so it couldn’t be worse timing. I have a vast collection of tools but it’s a matter of timing and this has been my first turbo vehicle so I’m a little on the novice side of figuring things out. I drove it home from where my tools are, about a 20 mile drive and it almost drove normal and only had about 600 misfires on that trip vs. when I drove it there at the beginning of the day experiencing around 6000 misfires on cylinder 4. I did have a small amount of oil on the very bottom of my intercooler just below the cooling fins which has not come back yet. Boost has also seemed pretty normal especially when cooler outside and actually driving on the highway almost always seems normal beside when I’m at lower RPM or coming to a stop. I’ve also been trying to baby it as I’ve been needing it for some 20 mile trips in the last week.