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#1
10-03-2006, 12:50 AM
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1986 560 sl
failed smog way too rich.found spark plug crossthreaded fixed it.
idle air controller will actuate if jumped with 12v but system is only supllying 1.2 v at idle to it. found injector o-rings leaking replaced all o-rings and sleeves. when checking for vacuum leak i leaned out system and artificially enriched area around intake.got a huge jump in rpm at back of throttle body area. took of fuel distributor air valve assy found no hoses leaking. charged intake with smoke and had no leaks in itake area at all. put it all back together and still get big hit with enrichment under intake. also vehicle idles at 15 to 16oo rpm. 
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#2
10-03-2006, 09:06 AM
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sounds like your idle control unit is bad.
Jonathan
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Blue Ridge Mercedes Jonathan Hodgman http://www.blueridgemb.com/ Enthusiast Service, Restoration & Tuning. Follow Us on Facebook! Located in the Atlanta area Specializing in all pre and post merger AMG's including Hammers and DOHC M117 engines. Mercedes Repair Atlanta
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#3
10-03-2006, 09:50 AM
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the actaul idle air control motor works when actuated if there is a control unit for it where is that located?
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#4
10-03-2006, 09:54 AM
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560sl
the control unit is mounted behind glove box along with 20 of it's closest friends.
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David S Poole European Performance Dallas, TX 4696880422 "Fortune favors the prepared mind" 1987 Mercedes Benz 420SEL 1988 Mercedes Benz 300TE (With new evaporator) 2000 Mercedes Benz C280 http://www.w108.org/gallery/albums/A...1159.thumb.jpg
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#5
10-03-2006, 09:55 AM
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ok i checked idle air controller no voltage to motor circuit
i apllied voltage with controller still plugged in vehicle idled down to normal idle 8v at + terminal of motor so is this a controller fault or maybe the controller isnt getting correct input Last edited by dingoatemybaby; 10-03-2006 at 06:30 PM.
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