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  #1  
Old 12-29-2003, 11:15 AM
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Location: Convent Station, NJ
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Idle Control Valve/Module test procedure? '85 SL

Hi all,

Are there troubleshooting procedures that I can perform on the Idle Control Module and Idle Control Valve for my car using common tools? (power supply, VOM, heat , vacuum) I'd like to see if they are responsible for my eratic high idle condition.

Thanks!

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Rick

'85 380 SL (sold)
'85 Carrera Flatnose
'71 280 SL Signal Red/Cognac
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  #2  
Old 01-06-2004, 04:29 PM
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Location: Los Angeles, CA
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Thumbs up

Sometimes when you tap it with a wrench; It will make the Idle go down and stay down. Give it a real good crack!
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Eric, 1983 500 SL
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Old 01-07-2004, 11:30 AM
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Eric,

Can you provide a littlemore detail? Which component should I tap and where is it located? Thanks!
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Rick

'85 380 SL (sold)
'85 Carrera Flatnose
'71 280 SL Signal Red/Cognac
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  #4  
Old 01-14-2004, 08:20 AM
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Join Date: Apr 2000
Location: Falls Church, VA
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Did you ever get the test procedure that I sent you? I'm not sure if that second email address worked.

A quick test of the valve is to move the connector back so that there is just enough space on the pins to connect the leads from a multimeter. With the engine idling, you should see about 5 volts.

If you pass this test, it means the idle relay is working and you have a failing valve. There are lots of posts on how to clean them. There are also a number of guys on e-Bay selling the OEM VDO valve for substantially less than the $240 and change which seems to be the going Worldpac price.
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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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Old 01-14-2004, 09:46 AM
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Location: Convent Station, NJ
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Chuck,

I thought I sent a "Thank You" Email....my apologies.

Yes I did receive and printed it for use in the garage.
Since it's about 5 degrees here right now I had to prioritize projects. The Mono valve replacement went to the top of the list. I plan on getting to this troubleshooting execise shortly....just trying to get all my ducks in a row so my time in the cold is short.

Thanks again for your help!

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'85 380 SL (sold)
'85 Carrera Flatnose
'71 280 SL Signal Red/Cognac
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