Has anyone change the IAC Valve? i just wondering what's the different in between those 2 valves, my car came out the one has the o-ring, but STM and other sell the other style, so when i have it replace it with the STM style didn't work right.

 

Search IAC--a ton of threads, none will diagnose a pic.

 

left one with the rubber sleeve over the actuator machanism is for an evo 8, right one with the exposed spring is for an evo 9

the o-ring pictured is not optional, it's mandatory. the IACV's i've seen all come with one, but if they dont then make sure to re-use the one from the existing IACV that's in the car

 

That make sense, but STM has the same valve for evo 8 and evo 9

 

YES, if you can, pick up the evo IX IAC...it will last longer. I've replaced 2 IACs (left pic) on my evo VIII and then finally came across one for a IX and installed it...(pic on the right). It has been a few years and the IX IAC is still going strong.

 

I have got the right style and my car idler when up to 2krpm

 

I am also needing to replace a faulty IACV on my VIII. If I order the EVO 9 style IACV (ie picture on the right) does anyone know what the part number is for the o-ring?Would like to order this as well...

 

Mitsubishi / MD628313 O-RING,THROT BODY IDLE SVO

Or you can use: Mitsubishi / MD628092

 

^^^ Thanks man!