I know on my 96 ex there is an idle adjustment screw. Question anyone ever play with it? I thought the computer overrides it in many cases?

 

Yeah i mess with it anytime i do a tuneup, plus if i ever have problems when it gets winter time. The ecu doesn't overide it from what i've seen so don't get crazy with it. A small turn in either direction can make a big diff.

 

Don't just play with the idle adjust screw. Diagrams for the proper procedures, which are engine and generation specific, can be found in the FAQs sticky.

At least for 6th generation Civics, there seems to be a wide range of acceptable settings as the ECU does indeed readjust if it senses the idle speed is off.

 

Aww wheres the fun of doing it by the book ron?

 

If it works for you, then no worries.

 

I'm just messing with ya, OP rons right go by the book.

 

Yeah I knew. No offense taken.

 

A long time ago like years ago, I did adjust it, my idle was low and did help, but do you think the computer readjusted it?

 

The last motor i just installed i had to adjust it cause it was sitting at about 200 at idle, its got about 8k since build, and still where i set it. It might adjust it a little but none that i've noticed

 

For both of my 6th generation Civics, I can turn the idle adjust screw a lot with having any noticeable effect on the idle speed. This is expected as the ECU is preprogrammed to maintain the proper idle speed (670 or 700 rpm) by its ability to control air bypass through the IACV. It's only at the most extreme adjustment settings of the screw that idle speed would be affected, at least for 6th generation Civics.

 

I read awhile back there is a procedure to adjust the idle, you have to unplug something blah blah.

So I am wondering it will only work if you follow a certain procedure?