Purpose of idle control valve is to provide extra air during period mixture is rich during cold starting. After that period ends, i.e. car is warm, it's out of the picture.

__________________
Kent Christensen
Albuquerque
'07 GL320CDI, '10 CL550. '01 Porsche Boxster
Two BMW motorcycles

I may be wrong, but I thought it also kicked up when the AC was on (to compensate for compressor drag) and when the car threatens too low an idle. Such as the power steering pump causing belt drag when under a tight turn at low idle - such as parking.

I cleaned mine up also. Helped a bit. The advice of some oil or lubricant is critical.

__________________
1991 560 SEL / 185k miles
1992 750il / 17k miles - project car

Check this out it details how to solve your adjustment of the ICV.

http://www.peachparts.com/shopforum/showthread.php?t=243090

Look at post 11 & 12.

Post 18 says how to make the adjustment.

The ICV does not affect the mixture and it is always regulating the idle speed contrary to what lkchris says.

__________________
I got too many cars!! Insurance eats me alive. Dave

78 Corvette Stingray - 3k
82 242 Turbo Volvo - Manual - 270k
86 300e 5 speed manual - 210k
87 420sel - 240k
89 560sl - 78k
91 420sel - 205k
91 560sel - 85k
94 GMC Suburban - 90k
97 Harley Davidson Heritage Softail - 25k
00 GMC Silverado 1 ton 30k

lkchris probably should've said that the icv's critical function is to get a cold engine up and started... but it does play a role in maintaining a decent idle..

i don't see a 124 in his signature..so i am not sure what his level of experience is wrenching..

__________________
1989 300ce 129k
( facelifted front,updated tail lights, lowered suspension,bilstein sports, lorinser front spoiler, MOMO steering wheel, remus exhaust,stainless steel brake lines). (Gone)

1997 s320 154k (what a ride). Sold with 179k miles. Replaced with Hyundai Equus

1994 e320 Cabriolet 108k



1972 280se 4.5 153k Owned for 12 yrs, sorry I sold it


[/SIGPIC]