Hey everyone,

Recently, the idle on my S hasn't been very smooth. Whenm I am idling, the engine will have a lump/bump at idle as you can hear in this video: http://www.youtube.com/watch?v=LG5yuK_Hn6U

When I am starting off in first gear, when there is a lump/bump in idle, it feels like the clutch disengages and then reengages - sort of like a loss of power for a second.

Has anyone had this issue?

I have already tried cleaning my Idle Control Valve and did a valve adjustment.

Could it be a possiblity that I may have air in my cooling system, and possibly may even need to do a radiator flush?

 

thats normal my s2k doest the same exact thing. the RPM fluctuates between 800-1000 RPM

 

Mine doesnt do this.

 

What I'm talking about is the exhaust sound. If you listen closely, you can hear a bump in idle, maybe even like a burp.

 

bump, anyone?

 

Watched the video and couldn't hear anything.

Does the engine kind of shudder at idle, like a slight shake? Or is it just a sound?

Does it sputter/misfire below 3K while driving?

 

Sounds to me like bad gas...

Are you using 91+ octane??

 

mine does the same thing lol, i think your fine.

 

Whippets2k - You have to listen closely to hear the bump in idle. I will get an exhaust cideo posted so you guys can hear it better.

Whenever there is the bump the engine shutters a little bit, and it does not spitter / misfire below 3k which makes me think its an idle issue.

Eagledon - I am running 93 octane and this has happened on more than one tank of gas.

S2cho - If your car does this too I would get it checked out because it isnt supposed to do that.

It looks like I am having more serious issues now. Yesterday, when I first started the car, I got a CEL for the idle control valve and the car stayed at 1000 rpm instead of the initial 2000-2500 rpm warm up. Today, I got a CEL for a p0336, P1366, and p1399 which is a misfire and cam position sensor I believe. I also got a couple other codes for the cam position sensor. I dont get whats going on...