Yes the idle control valve is electronically controlled. However if you take one of the idle control valves off the car and look at the center portion you will se a plastic cap. Taking an ice pick you can pop this cap off. Under the cap is what looks like a threaded brass insert. By screwing in a screw you can move this brass insert in and out. This changes the spring tension on the actuator, the less spring tension the less current it takes to drop idle. By playing with the spring tension I have fixed several cars with idle problems. Of course the first thing to do is clean everything using carburetor cleaner before playing with adjustment.
If you are looking at getting a new idle control valve for $180 it would be worth your time to play with the adjustment. Regards, Trampas -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of M.Affzaal.Khan Sent: Sunday, October 09, 2005 10:30 PM To: Mercedes mailing list Subject: Re: [MBZ] Bad idle after hot soak Adjustment? Is the Idle control valve not electronically operated? mak ----- Original Message ----- From: "Trampas" <[EMAIL PROTECTED]> To: "'Mercedes mailing list'" <[EMAIL PROTECTED]> Sent: Sunday, October 09, 2005 8:31 PM Subject: Re: [MBZ] Bad idle after hot soak > I found that the idle control valve was not adjusted properly and thus was > not letting the engine idle high enough on restart. After adjusting it > appears to work better. > > I am thinking about designing a new idle control module, one that will > supply more than 1000mA and will adapt to the worn idle control valves. > > > Regards, > Trampas > > > -----Original Message----- > From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] > On Behalf Of Trampas > Sent: Friday, October 07, 2005 7:15 PM > To: 'Mercedes mailing list' > Subject: [MBZ] Bad idle after hot soak > > I am having a strange problem with my 1991 560SEL. After I run my car and > get it warm, the cut off and let sit for about 1 hour, when I restart the > car does not want to idle. I thought it was the idle speed control unit so I > replaced with a used one and found no difference. > > I thought it may be leaking injectors but even after reving the engine at > 2000RPMs for a couple of seconds it does not clear up. Maybe someone else > has ran into this problem before? > > Thanks > Trampas > > > > _______________________________________ > For new parts see official list sponsor: http://www.buymbparts.com/ > For used parts email [EMAIL PROTECTED] > > To Unsubscribe or change delivery options go to: > http://striplin.net/mailman/listinfo/mercedes_striplin.net > > > > _______________________________________ > For new parts see official list sponsor: http://www.buymbparts.com/ > For used parts email [EMAIL PROTECTED] > > To Unsubscribe or change delivery options go to: > http://striplin.net/mailman/listinfo/mercedes_striplin.net > _______________________________________ For new parts see official list sponsor: http://www.buymbparts.com/ For used parts email [EMAIL PROTECTED] To Unsubscribe or change delivery options go to: http://striplin.net/mailman/listinfo/mercedes_striplin.net
