idle screw question

[yazmo]

here my question i may asking too much but if someone is willing to check this for me that would be so nice from you

i play with the idle screw and i din't watch exactly where, it's was
before i rise the rpm so i wonder if anyone who got a
legacy turbo 1994 sedan
could check with engine off how many turn you have to do so the screw don't touch the bar that raise the rpm when the screw pull it back. bcuz my idle speed is never the same so it's hard for me to set it between 600 to 800 rpm.

also i got a big problem with my fuel needle it's keep going up and down it's very very not accurated anyway i could fix this?

i found out that my car was accidented don't seem very serious but that could explain the stumble engine and vibration that i got
i am also hearing a siiiiiiiiiiiiiiiiiiii sound from the wind its seem to come from my front driver door. air is flowing and make resistance when i drive the car over 80 km i heard it very much.

that could be one of the reason why i am doing 250 km for 45 liter of gaz. i thinking of changing the o2 sensor.

anyway that my story got a nice car with many little problem
i like it very much but i am getting piss off of those issue.

all bushing of the rear end trailing arm are crush.