Hello all, I’m a soon to be broke college students who is very worried about his car. I love it so much and I got no clue what is going on. When I start it, it hovers between 700-1100 rpm, drives OK, small misfires every 30 seconds or so. Random order of cylinders. I’ve changed the spark plugs with no change and change the order of coils. Also probably should mention this; when I apply a little force (not a lot but a decent amount to speed up), around 2000-3000 rpm’s, a very strange vacuum like hiss is present with very small crackles noises as well. Please note, I am a teenager so I’m not the brightest light in the box. If possible talk to me as if a person would communicate to a dog. If it matters, I have a Alta cold air intake, m14 intake hose to turbo, and a Amazon oil catch can.
repairs include
last week- Detroit tuned turbo oil line super kit
last month- replaced valve cover with a aluminum one from amazon
2 years ago-Timing chain2B64 Intake manifold, unmetered air

2F8F DME: Engine switch-off time, plausibility

2783 Combustion misfires, several cylinders
I appreciate the help! Thanks in advance!