C-Class (W202) 1995-2000: C 200 CDI, C 220 CDI, C 270 CDI, C 180, C 200 K,C 230 K, C 220, C230, C 280

Where is the Idle Air control valve?

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Old Feb 29, 2004 | 09:48 PM
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Where is the Idle Air control valve?

Can someone tell me where exactly this part is located? Is it after the mas, or the piece after the mas? I think i just need to clean this thing out but i need someones help so i can find it. Thanks.
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Old Mar 1, 2004 | 07:40 PM
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Why are you looking for it?
The idle air is control by the computer and like I saw in your earlyer post it sounds like you need a M16 motor(throttle body).

If you have a 104 engine(silver valve cover) then its a PITA to change.

Brian
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Old Mar 1, 2004 | 07:46 PM
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The IAT sensor is on the intake right before it goes into the engine. It takes 30 seconds to check and change. This is on the older engine.
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Old Mar 1, 2004 | 09:33 PM
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can i just simply clean some junk out and try to make it work better or is it pretty much fried? i have near 95000 miles on the car and the check engine light has been on about maybe 1 and a half year.
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Old Mar 2, 2004 | 03:22 AM
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I'd try cleaning it with alchohol first. This trick sometimes works on even the air mass meter.
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Old Mar 2, 2004 | 04:49 AM
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Originally posted by DougandhisC280
The IAT sensor is on the intake right before it goes into the engine. It takes 30 seconds to check and change. This is on the older engine.
Just so I understand this correctly, if you stand in front of the engine and look at the air intake. You have the MAS on the left, the plastic trunking then snakes over the top of the engine and down into the throttle body. Just before it enters the throttle body up on the right hand bend of the plastic trunking there is a push fit sensor.........is this the IAT??????????
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Old Mar 2, 2004 | 10:33 AM
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BINGO!
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Old Mar 2, 2004 | 01:46 PM
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what is an iat? idle air throttle? so it is the part before the silver area?? i understand the part where the black snake lookin intake goes over the engine, it is the part right after that? what is that sensor on the HUGE air intake that is over the engine? not the mas but the sensor after that?

Last edited by sunrat; Mar 2, 2004 at 01:49 PM.
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Old Mar 2, 2004 | 02:51 PM
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Originally posted by DougandhisC280
I'd try cleaning it with alchohol first. This trick sometimes works on even the air mass meter.
carb cleaner should also do the trick...
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Old Mar 2, 2004 | 04:32 PM
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Idle Air Temperature sensor. It's right before the intake goes into the engine.
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Old Mar 2, 2004 | 10:08 PM
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ok is that sensor on the actual MAS itself? I tried cleaning the MAS and so far no CEL, but when i get this digimoto software to check my car, ill know for sure.
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Old Mar 2, 2004 | 10:08 PM
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ok is that sensor on the actual MAS itself? I tried cleaning the MAS and so far no CEL, but when i get this digimoto software to check my car, ill know for sure.
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Old Mar 3, 2004 | 02:47 AM
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No, it's not. If we were allowed to post pictures larger than one byte I could show you.

Stupid cheap forum. What happened to being able to give out useful information?
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Old Mar 3, 2004 | 06:43 PM
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hey doug if you can please send it to me at kings49ersfan@yahoo.com i would really appreciate it.
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