I purchased a 1999 civic si with b16a and the owner prior has adjusted this screw which I am to beleive is the air mixture screw does anyone know the factory setting on this how many turns out ,I do have a cold air intake and DC sports header with apex cat back exhaust if this matters ?

 

thats for your idle, if your car idles fine dont mess with it

 

yep what he said

 

i only ask because I can see that it has been messed with the car idles I think kindof high at around 1400

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Kooneryfz450 &raquo;</TD></TR><TR><TD CLASS="quote">i only ask because I can see that it has been messed with the car idles I think kindof high at around 1400</TD></TR></TABLE>


well if you look directly at the TB it should be almost at the very top(kinda a little bit to the left). you will need a flat-head screwdriver to adjust it and a tachmometer to make sure you are doing it correctly and within factory specs.

 

the screw usually is brass colored on the side of where the intake goes in the tb on the top. adjust rpm to about 700-800 as long as the idle isnt to rough you can go lower.

 

yea, 1400 is pretty high. Just adjsut it with the brass colored screw on the TB. I'd turn it down to about 800 or so.