Yaris Sedan 2008 Engine vibration

[seatech30]

Hello Everyone,

I've been dealing with this problem for over 30kmiles. When it first started it would only happen while the car was stopped on an incline/slope. Now it does it even when the car is on flat road.

I've replaced battery, spark plugs, cleaned throttle body and MAF with corresponding cleaners, cleaned engine filter, ran injector cleaner through fuel tank twice (BG 44k), and replaced 2 motor mounts. Yet it seems to be getting worse. I have 192kmiles now, and I first began to notice the problem around 30kmiles ago.

I've even tried a different MAF and nothing. I'm currently considering the possibility of a bad timing chain tensioner. I used a timing light on the crank shaft bolt and can see the bolt "shift" position as the car is revved. Is this normal?

Any help will be greatly appreciated, thank you!