2g SAS/BISS Question - SAS screw missing! :)

[jarodrm5]

I have a question about the SAS screw behind the throttle body. I've been trying to track down some occasional idle problems that I've been having(dropping 2-400 at stop lights, vibrations in cabin, etc), so I've been looking around my engine. My idle is usually anywhere between 500-1000, dropping lower when i brake soon after starting the car. I've replaced my vacuum lines, checked for leaks, etc, but I actually just noticed that my SAS screw is completely missing!

Any ideas what, if anything, my car would/wouldn't be doing without this screw? Any chances this could be related to my occasional idle problems? I looked at the 2G BISS adjustment FAQ and I noticed the SAS was mentioned, so I figured it may be related. I don't always have idle problems, but they are frequent enough to be annoying. Thanks!

Also, if it is necessary, is there any idea what size/type of screw/bolt it is? Something I could hopefully pick up at a hardware store.


Some additional information if needed - I had these problems before today, but today I replaced the plugs with 4x NGK BPR6ES as well as Accel wires. I also did a Seafoam treatment through the TB (yes, before I changed the plugs) These seemed to help a bit, but its still there intermittently.

 

[pj91gsx]

The BISS screw is your problem. the screw is used to adjust you idle. When it is not there you idle will be very low. I just adjusted my idle for my 1g.

http://www.vfaq.com/index-main.htmltoday.

 

[jarodrm5]

I went ahead and adjusted it up to a pretty steady 1000 - I'm going to see if that solves the problem. How long, if at all, does it take to recognize that I have been fiddling with the idle and adjust it back? This is on a 2G. Still strikes me as very weird that my SAS screw is just not there. Thanks!

 

[pj91gsx]

I have not worked with a 2g setting the biss screw and ignition timing but it took about 30 minutes or less to get my 1g idling good. Did you order a biss screw yet?

 

[jarodrm5]

I actually have the BISS screw, its the SAS screw behind the throttle body that I am missing. I adjusted my idle via the BISS screw this morning, and it seems to have helped it out, so lets hope that was all it needed. Thanks!

 

[pj91gsx]

ok. I havent heard of the screw. If it is something that can be or needs to be adjusted it is probably on vfaq.