Boggs and sputter

Hello, In situations like this, I don't like to make recommendations on repair. Instead, I say the same thing every time: have it diagnosed before buying any more parts. Obviously if you have the skill to change the timing chain yourself, you likely have fixed many issues on vehicles before, but when you start noticing that the normal fixes aren't working, it is a good idea to pay a diagnostic fee instead of dumping parts into it. That being said, the issue is likely that the engine is getting too much air or not enough fuel. Before the engine is at operating temperature, the engine control module will be running the engine rich on fuel similar to how engines used to have chokes. You may have a leaking air intake tube, no filter, or the filter housing may be letting too much air through to the throttle body.