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Old 10-17-2003, 08:41 PM   #1
AcidSnow
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idle control valve

can someone tell me where the idle control valve is on my e36 328i? I'm having strange idling problems, and this might be it - but I can find it! how easy is it to clean?
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Old 10-17-2003, 09:17 PM   #2
low_bmw
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Are you sure it's the idle control valve. I had the same problem and my shop said it was either that or O2 sensor and it ended up being the O2.
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Old 10-17-2003, 10:48 PM   #3
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Bad idle can be o2 sensor related, but it's most likely an air intake leak, vaccum leak, or idle control valve.

Your idle control valve is a silve cylinder under the intake manifold. It's a real bitch to get out though, but I managed to do it on my car in about an hour, but I ended up bruising my forearms squeezing them under the manifold to pull it out.
I guess the proper way is to remove the intake manifold, but then you get into all sorts of other complications like removing the fuel rail etc....

Try this first though....

Goto canadian tire, and get this stuff called INTAKE MEDIC. It's a spray in a red/black can. Pop off the Idle Control Valve breather hose from your intake boot, and while the car is running, spray a bunch into the tube and it will suck it right through the ICV cleaning it out (hopefully). After squirting, the car will sound like it's about to stall but then recover....rev the engine via the throttle body cable, and repeat until idle surging is gone.
If that doesn't do it, then you'll need to remove the unit and clean it by hand like I had to...the thing has a little flap that opens and closes, and mine was stuck halfway open because it was gummed up. After spraying it a bit with the intake medic, it works like new!
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Old 10-18-2003, 02:39 AM   #4
AcidSnow
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I still don't know what the breather hose is, I'm gonna attach 3 pictures, maybe someone can paint an arrow for me - please! I'd like to try that medic can thing
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File Type: jpg resize of cs 009.jpg (28.3 KB, 62 views)
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Old 10-18-2003, 02:39 AM   #5
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Old 10-18-2003, 03:09 AM   #6
djcontra
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it will be in one of these spots. I forget which one, but one when you take both out, one is plugged with a pointy sensor, and the other like an open hose sucking in air <---that's the one you want.
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File Type: jpg intake boot.jpg (51.2 KB, 64 views)
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'94 Supercharged E36 325is (150,000 original km's)
Mods
-Vortech V9 G-Trim @ ~10psi w/ BOV
-Shortstack headers
-Vortech RRFPR
-255LPH Walbro fuel pump
-TEIN SS Coilovers w/ Pillowball mounts
-Keskin KT1 17x8.5 & 17x10
-Remus full catback
-Authentic Rieger Infinity I body kit
-SMT6 EMS (Untuned)


Last edited by djcontra; 10-18-2003 at 03:12 AM.
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