I'm assuming this is the idle control and praying that cleaning the plunger will fix my idle issue.

 

Your BISS screw is how to adjust the idle (with evoscan). The BISS screw is behind the throttle body by the firewall side.

What plunger are you talking about? The EGR valve? Are you throwing any codes?

Otherwise check your IAC to make sure it is still working.

 

Doesnt the IAC use a plunger? I had read a few people with idle issues cleaned the plunger in the IAC and everything was fine. I'm not throwing any codes. My car idles between 0-1000 rpm and within 10 seconds it'll stall out. Crusing and WOT car is fine, including afr's.

 

Where is the IAC located?

 

That black thing in the lower right corner.

 

Ok. These look like the screws to take it off. Are there other screws you cant see from the top?

 

The picture you posted isn't correct. That may be from the older evos. The current throttle body looks like this




As you can see, that's not he same black plastic piece.

 

He posted a picture of the IAC (idle air control) NOT throttle body. His picture is correct.

 

Yes... he posted a picture of an IAC from an EVO 8/9. Referring to the first picture I posted, he said it's the black piece in the bottom left. I posted an evo x throttle body to show that he was incorrect. After a little more research it seems the Evo X does not have an IAC.

 

Drive by wire cars typically do not have an IAC valve. The ECU just opens and closes the throttle slightly to maintain idle, but it has upper and lower limits, you may have some build up on the throttle blade that is reducing air flow and causing the stalling.

 

Thanks for the suggestion. I took off the licp and made sure everything I could see in the throttle body was clean. I also changed air filters, checked for vacuum leaks, cleaned the maf sensor, replaced the pickup filter for the fuel pump. Still having problems.

The main thing I dont understand is that if i reset the ecu, the next time I start the car it will idle fine. I can go for a drive, come to a stop, turn on the ac, anything and it'll run fine. Now once I shut it off and start it up for the 2nd time, it all goes down hill instantly. So as long as i reset the ecu before every drive, it'll be fine lol.

 

If you don't have EvoScan and an OPII cable, I would recommend investing in both right about now.