So to start out I was getting like really terrible gas mileage and when I mean terrible like 8mpg 😫 so I decided after looking around to replace o2 sensors I am not 100% that the problem
is solved but I will know after this tank of gas. I also switched out the camshaft solenoid. I believe that’s what it’s called and camshaft sensors for the hell of it. Seems like the engine doesn’t shake as much as it did even after the MAFS and TB cleaning was done. But it’s was a fun process

 

Would be nice to figure out when O2/Camshaft ones need to be changed.
I had rough idle and engine was around 1k rpms when starting and did not drop down much.
Cleaned MAF/TB(gunky), found intake manifold was loose, tightened it.
Putting manifold back properly made huge difference in vibration and MPGs.
Engine works better, less rattle, RPMs drop down to 600-700 after start(1k+ initially), but takes around 1 minute, not sure if that is normal.
When stopping on red light, engine drops to low 600 RPMs.

Found that small hose(PCV (Positive Crankcase Ventilation) Hose) from engine to resonator??? is cracked, will change it next.
Will take out Camshaft sensors/solenoids and clean up with TB cleaner.
After that will look into changing O2 sensor.

 

i will check my manifold to
see if it’s loose. But I think what you described is the normal rpms well that is what I get. You should snap a picture of that hose. I am
curious to see where the crack is.

 

This is the one!
Swapped it, did not ran the car after it, was too busy.