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Old 02-14-2003, 04:01 PM
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Join Date: Dec 2002
Posts: 75
Lambda at 25 - should be 42 (84 380SE Fuel Consumption)

Hi all:

I have been griping about the high fuel consumption in my 84 380 SE for a long time. So I finally broke down, took it to the stealership and allowed him 1 hr to tell me why.

This is what he says, I quote "your lambda is 25 while the spec is 42. We cannot crank it up any higher . We do not know why - could be the fuel rails or the injectors".

I wanted to ask you all what this means ? Should I replace injectors ? Or replace the cold start valve ?

Thanks,

Amit
84 380 SE
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  #2  
Old 02-14-2003, 05:28 PM
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Join Date: Apr 2000
Location: Falls Church, VA
Posts: 5,316
Translation: You are running rich and we cannot tweak the mixture any further to fix it.

Suggest that you do a search on this topic (mixture, injection, lambda) to educate yourself on probable causes. It could be the causes you named, plus the fuel distributor or warm-up regulator, or a combination.

You also ought to find an independent shop that you trust to do further checkout - these are very expensive parts to throw at a problem!
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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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