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3-Series (E21, E30) Chat relating to the BMW 3-Series from 1975-1983 and 1984-1991 line. Specific models: BMW 315, BMW 316, BMW 318, BMW 318i, BMW 320/4, BMW 320i, BMW 320/6, BMW 323i, BMW 320i. E30 Family models include: BMW 325e, BMW 325i, BMW 325is, BMW 325ix.

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Old 01-16-2004, 06:38 PM   #1 (permalink)
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i've heard a lot about the icv getting carbon stuff all over it and being the culprit for idle problems... but i'm wary of doing this on mine, i was hoping someone knows of, or can tell me how to clean it.
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Old 01-16-2004, 09:43 PM   #2 (permalink)
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I actually just cleaned mine, all I did was remove it and spray choke/carb cleaner into it. There really was a bunch of carbony build-up, so I just sprayed out both holes and now it works great. Just shake the extra cleaner out; it evaporates away quickly. It took my car from barely being driveable to running solid like a German tank.
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Old 01-16-2004, 10:51 PM   #3 (permalink)
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hmmm good that my problem though i can't figure howto take it out though
is it the little metal stand bolted to the intake?just take of the nut?
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Old 01-16-2004, 11:22 PM   #4 (permalink)
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What year is your car?
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Old 01-16-2004, 11:35 PM   #5 (permalink)
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1987 325i convert
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Old 01-17-2004, 01:43 AM   #6 (permalink)
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I have an 89' 325i; on mine it is between the intake manifold and the boot leading to the throttle body. All you have to do is disconnect the two hoses and the electrical connection, then disconnect the rubber connector UNDER the ICV. I didn't have to unscrew anything, it just popped right off.
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Old 01-17-2004, 07:57 PM   #7 (permalink)
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here is my icv
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Old 01-17-2004, 07:59 PM   #8 (permalink)
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hoses to disconnect? feel free to deface my photos
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Old 01-17-2004, 09:09 PM   #9 (permalink)
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That's the culprit! Just pull the electrical connection off, pull the ICV out of the intake boot, and pull the little elbow out of the manifold. Once you have it all unhooked you just have to spray it out w/ some choke/carb cleaner; I made sure not to spray it way back toward the electical end. I sprayed it out really well, reinstalled it, and my car idles perfect. It really did make a huge difference, and it took all of 10 minutes.
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Old 01-17-2004, 10:38 PM   #10 (permalink)
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ok here i go
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Old 01-17-2004, 11:07 PM   #11 (permalink)
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hmmm i got it and did my best to clean it but the idle still slowly climbs to 2000 hmmm at least i figured out how to get it out and what my problem was... i couldn't see the rubber clips things underneath it, which is the first step i guess i'll reread the stuff on this i don't think its the o2 sensor it was replaced about a year ago...
edit: maybe i didn't clean it well enough... does the back half (side with conecting tubes) come off or somthing cause i can't really see that much of it just little gear type things. or maybe it was that i didn't use carb cleaner i heard i could use rubbing acohol, so i did.
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Old 01-19-2004, 10:54 AM   #12 (permalink)
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I use choke/carb cleaner because if sprays out with enough force to "scrub" the junk out of the parts, and it evaporates within a minute.
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Old 01-21-2004, 07:32 AM   #13 (permalink)
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Hi there, could you tell me where the ICV is on a M10 engine ('87 UK 316)? The idle on mine isn't smooth and I'd like to try this. Thanks.
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Old 01-21-2004, 02:55 PM   #14 (permalink)
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here is an e36 an you saw mine they look pretty similar... or you could post a pic of your bay and we'll show it to you
http://www.bmw-forums.com/forum/index.php?showtopic=506
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Old 01-23-2004, 09:03 PM   #15 (permalink)
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alright heres an update the idle was still unstable after cleaning it so today we took it down to the shop for other things and the tech thought it was the icv also and said the the stuff behind what you can see is what was broken...so if for some guys that have tryed cleaning it out with no luck might just have to pony up the dough... that did also fix it btw old/ new pics following...
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