DA9 Engine Problem?

ASSISTANCE Stock Engine-Bay Components
1

Okay guys, so I drive a DA9 with the stock B18A1 motor. I was driving home from school yesterday with my little bro and I got halfway out the parking lot and my car was making these wispy noises like air was passing through somewhere. I put my foot on the gas, and it goes away. I let the car idle, it keeps going on. I brake, it keeps going on. At first I thought it was the speakers so I took out the faceplate for my head unit. Still keeps making noise!

The tachometer (RPM gauge) also shows that my car is revving while stopped or parked. I pulled over in a parking lot and popped the hood and I didn’t see any visible problems. Once I left the parking lot, my steering wheel got hella loose and squirrelly like I had lost powering steering but I replaced the P/S pump a few weeks ago.

I don’t know what the problem is but if I had to guess it’d be my IACV (idle control valve).

2

so what’s going on with the idle when you’re stopped? is it loping/surging?

3

It idles hard, there’s slight surging, but my car isn’t moving back and forth or anything. It idles hard, I don’t know how to explain it any other way.

4

sounds like vacume leak

5

I’m fairly certain its the IACV now. I tightened up a bolt for my current IACV and the “revving-while-parked” stopped. I just need a new idle control valve, unless the problem continues.

6

you tightened up a bolt? was one of them loose?
and what do you mean by it idles “hard”?

7

the bolt was loose, and it needs to be loctite’d.

it idles hard when i have it in drive. when i sit at a light or a stop sign, it vibrates.

at first i thought it was motor mounts so i replaced all those, and it helped alot, but it’s still idling rough.

8

whats the rpm at a stop light.