ls911

I have done a search and read all I could find on rough idle. I am aware that the seats will shake a little, all part of its character, that's fine.
My engine seems to hunt a by approx. 30-60 rpm most of the time.
When I run the fan (heat or cold air) it smoothes out some, easy to notice this.
I just got done cleaning the TB and made no difference (it was very clean to start with)
As far as the ICV goes I am having a hard time finding it.
Looking to the left of my TB I see no screws or ICV, just a hose with a squeeze type clamp (?)

First of all is my idle hunt normal? How smooth is it supposed to be?
Were is the ICV, any pics?

As always, thanks for any info

chsu74

Ludwig,

My idle hunts around 50 - 100 rpms. It appears normal. ICV valve is on the '99s. I believe you have egas like mine.

Cheers

Benjamin Choi

Hey Bo$$,

If you have one of those digital cameras that can video, you should consider taking a quick flick and posting it up on youtube or something. Probably will go a long way to seeing what's going on with your ride.

ls911

Thanks Chao, good to know this info.
I'm still in the early stages of learning...


Good idea, will try to get this done when I get some free time to play w/it.

Chads996

A perfect idle (achieved after I cleaned my TB) is like a sewing machine. Smoooooooth...

C.

himself

I have a brand new crate engine with 1700 miles on it. My idle isn't locked. It moves around a little but not much. This is less movement than my 59000 mile motor. In contrast, my wife's 335i idles dead-on with no movement. I don't even think about my idle - it's all part of the machine.

-td

gregorycarl

Just checked mine this morning. Smooth as silk. I wonder if air temp, humidity has anything to do with it or if the computer takes care of that. Someone must know all the details...

redridge

air leak after the MAF sensor. make sure no extra air is getting sucked in at the intake area. try cleaning your MAF as well.

ls911

Will take a close look for leaks and clean the MAF later on today (this has not been done as far as I know).
Can't hurt

Thanks redridge

ls911

MAF cleaned (looked clean to start),. No real change in the idle hunting. I took the red fabspeed hose off and whipped the TP clean (did not remove it) w/lint free rag.
It was a little dirty but not so bad, no real carbon build up to write about.
No air leaks noted.
Might just go back to the original intake set up and see what it does, not sure if I can notice the sound dif with after market mufflers in place.

Otherwise looks to be normal as Chao has stated. Just seems odd that some say their idle is solid/smooothe and others have this glitch

redridge

let us know if the stock intake does the trick...

htny

this is actually a good idea, we should all get audio of our (warmed up) cars idling, revving a little, and ideally driving away at wide open throttle. Would do well for everyone's peace of mind as a baseline for comparison on these "sound" issues moving forward, especially for new owners, people with PSEs or mods or aftermarket cats, intakes, before & after throttle body cleaning, or whatever. Next time I have the car out in the country I will try to do this.

billh1963

My X-51 idles relatively smoothly. At start-up it does have a slight "lump" to it when cold....I attribute that to just a sign of the "bad ***" in it waiting to be unleashed!

6ocyclehum

My 66K '99 idles very smooth. It had a bit of a "lumpy" idle when I first got it, I commented on it to the PP-inspector, who said "they all do that", but it has gone away. I've been driving it a LOT, and pretty hard. Nice when things fix themselves!

ls911

Thanks for all the information/input.
I will do a clip of idle and post in the next day or two as per Ben-CCC-uniT.