I had this problem with my '97 Accord, tach bouncing up and down like a yo-yo, and before I pulled the IACV to clean it up, I decided to clean the electrical connectors first with some CRC QD Electronic Cleaner. (Pulling the IACV isn't difficult, but I always follow the path of least resistance first.)

I sprayed both the male and female ends of the connectors on the IACV until dripping, let them dry, reset the ECU and started the engine. Let it idle (under NO load) until it reached operating temp, and....

It's been idling perfect ever since. It purrs like a kitten at about 730 RPM. That was several months ago and the idle is no longer an issue.

I guess I got lucky.

 

i have this same problem idling on my 95 accord, i cleaned everything out, looked for vaccum leakes, where is this idle screw at?

and how do i reset my ecu?

thanks

 

Look in post #10 at the picture I posted. Idle screw is #1.

Reset ECU by disconnecting battery, but then you'll need the security code for your stereo. There's probably a fuse you can pull to do the same thing but I don't know which - "radio-backup" or something like that?

 

i hate to be a pain, but does the adjustment screw have a hex head or should it look like a screw?

 

Flat-blade screwdriver. It should be recessed down in a hole, and I think it's brass.

 

yeah i found it, somebody put a seal over it, but my car was set to idle at 1700 rpms, it idles nice now, thanks for the help =)