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  #1  
Old 01-18-2015, 04:52 PM
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Join Date: May 2012
Posts: 65
Replacing Idle Speed Control Valve Boots

The boot that connects the Idle Speed Control Valve to the throttle body on my 81 380sl is brittle and it has a small crack in it from prying valves out and pushing them in . So I was going to replace it and the other boot, which connects the valve to the cold start flange.

Before I do, however, I was wondering if the boot to throttle body will just lift up and off of a pipe on the throttle body, or if there's something else I need to consider. Also, I notice that the newer version of the boot to the cold start valve flange now has a vacuum line coming off of it, and I don't think the original one on my car had that, because I replaced it with a piece of heater hose a few years ago. If so, should I just plug the vaccuum line hole, or leave it open.

Thanks for the help, guys.

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Old 01-19-2015, 12:20 PM
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Join Date: Nov 2008
Location: NE Oklahoma
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Elbow just lifts off IIRC. The other one may have what looks like a vacuum port but on mine it is solid, not open. Maybe it has to be opened to use on another model.
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Old 01-20-2015, 05:53 AM
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Thanks a lot, Rowdie. I'll give it a shot.

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