cleaned up the iac valve about four weeks back, that didn't seem to have much of an effect on my idle. sometimes it idles at around 900rpm, other times it sits at around 1200rpm. also, when i try to hold a certain RPM, the motor revs up and down within about a 500rpm range. for example, if i'm trying to hold it at 3500rpm, the revs will fluctuate between 3000 and 3500 roughly every two seconds.


could it be to do with the fast idle thermo? kinda running out of ideas... i did the little test where you put your finger over the hole, and it seems to be working as normal.

the other funny thing is that turning the idle adjustor screw doesn't seem to effect my idle. why would that be?

on a side note, i have a hondata s200, could it be related to this?

 

Cleaning the IAC won't fix it if it's broken.

 

i spose so... but is there any way of testing it out? or do i really need to go out and buy another?