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  #1  
Old 08-15-2003, 05:18 PM
61220SE
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380SL Lambda Location

I have a wire short from the Lambda unit to the idle control unit on my 380SL. It is intermittent. Sometimes I get 4 volts at pin 2 on the idle control unit and it runs fine, then I get 0 volts and I get the high idle. I Checked the relay. God I hate to work on 107 body SLs everything is stuck where you can't get to it! Anyway somewhere between the idle control unit and the Lambda unit I have a short.

Stupid question but where can I find the lambda unit on a 380SL.

Thanks,
Michael
69 280SE Coupe
61 220SEb
66 300SE cab
91 300SEL

friends 380SL
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  #2  
Old 08-15-2003, 08:58 PM
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Join Date: Apr 2000
Location: Falls Church, VA
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Passenger footwell under the carpet.
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Chuck Taylor
Falls Church VA
'66 200, '66 230SL, '96 SL500. Sold: '81 380SL, '86 300E, '72 250C, '95 C220, 3 '84 280SL's '90 420SEL, '72 280SE, '73 280C, '78 280SE, '70 280SL, '77 450SL, '85 380SL, '87 560SL, '85 380SL, '72 350SL, '96 S500 Coupe
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  #3  
Old 08-17-2003, 06:24 PM
61220SE
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Talking Thanks!

Found the Lambda unit hidden in the floor. Rewired to the relay and now the idle control unit works correct and the 380SL has a nice 750rpm idle and no hisitations what so ever.

Thanks again

Michael
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  #4  
Old 08-17-2003, 09:53 PM
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Join Date: Apr 2000
Location: Falls Church, VA
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Uh, actually it should be 750 until about 40 degrees water temp, when the temp sensor in the back of the right head switches from 12 to 0 V output and the idle then drops to 450-500. This is on an '81.

You might want to check if you are getting into closed loop.
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Chuck Taylor
Falls Church VA
'66 200, '66 230SL, '96 SL500. Sold: '81 380SL, '86 300E, '72 250C, '95 C220, 3 '84 280SL's '90 420SEL, '72 280SE, '73 280C, '78 280SE, '70 280SL, '77 450SL, '85 380SL, '87 560SL, '85 380SL, '72 350SL, '96 S500 Coupe
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