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  #1  
Old 11-16-2000, 09:41 AM
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Join Date: May 1999
Location: Calgary, Alberta, Canada
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I would like to check to see if the idle fuel mixture is set correctly.
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  #2  
Old 11-16-2000, 09:45 AM
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What kind of tools will you be using? There are a number of ways. The easiest is by monitoring the duty-cycle at pin#3 of the diagnostic socket. It will take at least a DVOM with frequency/duty-cycle functions.


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Steve Brotherton
Owner 24 bay BSC
Bosch Master, ASE master L1
26 years MB technician
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Old 11-16-2000, 04:53 PM
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I remember on my 190E you would take a voltage at one of the pins at the diagnostic socket with the o2 sensor unplugged. Then you would plug it back in and adjust the allen screw in the center of the air cleaner until it was fluctuateing on both sides of the voltage. Within +/- 0.8 volts. Is this the same?
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Old 11-16-2000, 05:51 PM
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Look at the other post about lambda adjusting he has the set-up correct. You should be using the duty-cycle funtion on a DVOM.
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