IamtheThunder

New poster here. I have a 2006 Scion xA manual 132k . For a little background, couple weeks ago, noticed when I am driving, the car will start to shake a little bit but it will go away after a couple of seconds. Took it to a mechanic, said nothing was wrong. Couple days ago, engine light pops on, MAF sensor. Changed the sensor and air filter. Went to drive it today, when I downshift and rev match, the accelerator has a delay and it will take a second before anything will happen when I press the gas. Went to leave work and the car felt like it was stalling out when I was taking off, had to keep pressing the gas to get it to go. Any ideas of what might be going on?