just like the title says my car is all done and sometimes i cant get it to stay at a steady idle . i blocked off everything else besides the bac vavle . idk how to check it . the 2 hoses near it that suck in air i blocked off too . the first time i got everything right i got it to idle at 700-800 perfect . took off my BOV and block it off for now . till my turbo xs is put on . and it started acting weird after that idleing at 1.23. so every 1 knows i got no vacumm leaks at all . i messed with the idle screw on the side of the tb to keep it at a steady 800rpms idle mint next time i goto start the car it would idle at 1100 so i turn it down more back to 800 then i goto start it again dont want to stay on unless i give a lil bit of gas . now im lost i should have never touched that idle screw and i did set my tps before rebuild.. so do i need to set it again? i also messed with idle rich /lean screw no diffrence really.

 

1) You probably blocked off the thermowax.... that will lead to a hard idle on cold starts.
2) Sounds like you also capped off the air supply to the BAC. The BAC needs an air supply from the intake, before the throttle body.

 

i knew it so i did block off the air supply...so can i just hook up a hose to it and go to the big nipple on the top of he manifold ? and then i need to make a custom hole in my ic piping for the other side of the bac valve right?

 

There's a nipple that (on a TII) that comes off the bottom of the BAC valve. That needs to get a fresh air supply from somewhere between the AFM and the throttle body.

 

and the bottom nipple goes to the ic piping right?

 

wow im an idiot lol i just re readd what u said . i know wat todo thanks man

 

Hope it works out for you.