Quote:
Originally Posted by Stretch
...I think I need to go back to the FSM and see if there's any more information to be gleaned...
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OK - that was a merry dance.
No information about this on
www.startekinfo.com that I can find.
So I went and had a look in the German language version of the W123 FSM I've got to see if there was a functional description chapter for CIS in either the M110 or the M102 engine sections.
I found them both - but my German is not up to understanding it all. I did find a chapter number though =>
Chapter 07.3-001 that's the one explaining in nice terms how CIS works!
Back to startek - couldn't find that chapter in either the W201, W124 R/C107 or W126 FSMs
I eventually found it "elsewhere" in a W126 FSM
Here's a snippet describing the air idle control valve - from this information it does indeed seem to be working much like I expect a choke to work
It strikes me to be a fancy electromagnetic choke - there's a basic AC signal (what would you call it DC modulated?) that fluctuates at about 200Hz to energize the magnet - the basic DC amplitude pulls the opening to different positions.
This is in some way related to the temperature sender - I need to read some more but have to bugger off elsewhere in a minute so I haven't got the time to get to the bottom of it just yet!
I think the problem I have is possibly related to a leaky diode(s) on my alternator which might be arsing up the excitation voltage for the air idle control valve...
...perhaps that's also happening for you Bob?