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  #1  
Old 05-11-2007, 01:51 PM
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Join Date: Sep 2003
Location: France
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Question on Idle 260E 1988

Hi everybody,

I would like to know if the air necessary to the engine at idle is going only through Idle control valve or though throttle body?

Is throttle flap completely closed at idle? or slighty open to allow some air to go to engine?

Engine is M103 on 260E 1988 euro

Thanks for your help
I like to know how things work
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Present cars:
My car: E-class 420CDI, 2008, W211, V8,[/B] 50 000km

Wife's one: C-class 220CDI Sport Coupé, Euro, 2002, W203. 245000km

Son's one: GLK class 220CDI, 2009, W204

Sold E class 260E, W124, 1988 beloved car sold after 489 000 kilometres of reliable services (engine M103, clutch and 5 speed manual gear box all original).
E-class, W210 320CDI, 2000[/B], 225 000km, Sold

Last edited by cc260E; 05-12-2007 at 05:47 AM.
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  #2  
Old 05-12-2007, 10:04 AM
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Idle air bypasses the throttle but not the airflow meter. The throttle can not be closed totally though or it would stick. The throttle has a stop to prevent this from happening and plays no part in idle adjustment.
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Continental Imports
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  #3  
Old 05-12-2007, 10:19 AM
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Join Date: Sep 2003
Location: France
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Thanks you stevebfl,

this helps me to better understand.

I messed up the adjustment screw; and now I m trying to get back to the right setting of the stop.

Then if I understand correctly I should close as much as possible the throttle with the adjustment of the stop screw without sticking. Am I right?
__________________
Keep us posted especially if your problem is solved
Present cars:
My car: E-class 420CDI, 2008, W211, V8,[/B] 50 000km

Wife's one: C-class 220CDI Sport Coupé, Euro, 2002, W203. 245000km

Son's one: GLK class 220CDI, 2009, W204

Sold E class 260E, W124, 1988 beloved car sold after 489 000 kilometres of reliable services (engine M103, clutch and 5 speed manual gear box all original).
E-class, W210 320CDI, 2000[/B], 225 000km, Sold
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  #4  
Old 05-12-2007, 10:34 AM
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Location: Gainesville FL
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Yes, that is exactly what to do. Close it just as far as can be done without it sticking.
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Steve Brotherton
Continental Imports
Gainesville FL
Bosch Master, ASE Master, L1
33 years MB technician
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  #5  
Old 05-12-2007, 10:42 AM
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Join Date: Sep 2003
Location: France
Posts: 487
thank you stevebfl for such quick replies.

Do you think I have to do it with all MAF and Distributor removed of just by feeling without looking to the throttle?
__________________
Keep us posted especially if your problem is solved
Present cars:
My car: E-class 420CDI, 2008, W211, V8,[/B] 50 000km

Wife's one: C-class 220CDI Sport Coupé, Euro, 2002, W203. 245000km

Son's one: GLK class 220CDI, 2009, W204

Sold E class 260E, W124, 1988 beloved car sold after 489 000 kilometres of reliable services (engine M103, clutch and 5 speed manual gear box all original).
E-class, W210 320CDI, 2000[/B], 225 000km, Sold
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  #6  
Old 05-12-2007, 10:58 AM
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Join Date: Mar 2000
Location: Gainesville FL
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Pretty tough to do with throttle installed.
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Steve Brotherton
Continental Imports
Gainesville FL
Bosch Master, ASE Master, L1
33 years MB technician
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