I went to check the balance on my wheels. It turned out the front left wheel developed a small "bulge" on one of its vertical sides (not the one that faces the road). I didn't have a new tire, so he rotated the front left and the rear left. It also turned out a small plastic ring that sits between the wheel hub and the wheel disc on rear left wheel had been trashed. It seems like the last time they weren't installed correctly and the wheel tightened on top of them. They looked like if they were put under a press. He threw it out and installed rear wheels without it. Said these weren't really necessary.
Hopefully tomorrow I will change both rear wheels. However, at the moment car keeps pooling to the left. Tire pressures are all the same. I didn't have this before. Does that ring really unnecessary?
wheels are 225-16R-55