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Old 02-16-2003, 04:34 PM
ctaylor738 ctaylor738 is offline
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Join Date: Apr 2000
Location: Falls Church, VA
Posts: 5,316
If it's like the 380, there is a coolant thermo switch on the back of the engine. If you pull off the connector and bridge the contacts, you are simulating cold running.

Again on the 380, the lambda is controlled by an oil temperature sensor.

But I agree that with an idle that high you are probably not getting any voltage to the valve, or the valve is stuck open.
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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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