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#1
03-05-2003, 09:45 PM
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Idle speed adjustment on '87 420SEL
I am working on a '87-420SEL and the idle speed won't come down below 1100rpm. I cleaned out the idle stabilizer and it is working. Is there an adjustment screw somewhere on the CIS to get the idle down to a right setting?
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My Truck.. 2007 DODGE, 5.9 Cummins, 6spd stick, 4X4. My car..1977 240D, OTHER WHEELS...1955 VW Oval window bug, European Delivery (Holland) with a 1700cc, 2 barrel, Porsche drum brakes. 1939 WILLYS Pick-up. 1967 Triumph 200cc Tiger Cub. 1976 Honda 550F 4cyl Motor Cycle. 
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#2
03-05-2003, 10:08 PM
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Whenever I have a high idle issue I ck the mixture setting. On old ones you have to use a Lambda box and later ones you can ck milliamps at the EHA. The reason I say to ck mixture first is that if someone leaned it idle will go up. Is your ABS light on also? Now after you know the mixture is right some idle control units have adjustments on them, if its original it probably doesnt. After that you are gonna have to get the manual out and ck for voltage at the unit . If the idle speed unit is bad it is best to replace unit and valve together.
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euro 287 Mercedes Technician 7 Years (retired to Hyundai) 2000 Dodge Durango 98 Mazda truck
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#3
03-06-2003, 01:10 PM
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euro 287, To be truthfull with you, This sounds a little over my head
 . I may have to refer him to a friend of mine that has a shop. Thanks
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My Truck.. 2007 DODGE, 5.9 Cummins, 6spd stick, 4X4. My car..1977 240D, OTHER WHEELS...1955 VW Oval window bug, European Delivery (Holland) with a 1700cc, 2 barrel, Porsche drum brakes. 1939 WILLYS Pick-up. 1967 Triumph 200cc Tiger Cub. 1976 Honda 550F 4cyl Motor Cycle.
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