[W126 Coupe] Re:IDLE AIR VALVE VOLTAGE

[Ian Gatenby]

I solved the idle speed problem on one of my cars (an old 500SE that I use
to tow a boat) by applying an external variable voltage supply to the air
slide.  These are cheap to buy (Tandy, etc) plug it into the cigarette
lighter - run a connection to the air slide.  I remove the plug from the
lighter socket to start the car and plug it in as soon as I move off.  Not
an elegant solution - but it works.  You can vary your idle speed by varying
the voltage to the slide.

Ian

................
Hi Folks
    I am still having problems with varying idle speed which can peak at 
1000 rpm.
    I have applied varing voltage (1-12) on the bench and the valve seems to

operate fine, on the car at idle the volts while connected are 4.7 cold 
decreaseing to 4.1 warm .I am sure you guys said that 3 volts was the norm 
which in theory(4.1) should make the engine idle slower than normal.
    I had a mad idea, if both exhaust pipe and intake were sealed and 2-3 
psi of air was introduced into the manifold would that detect any air leaks 
in the system,or could the oil rise out of the dipstick(scary) if it was not

sealed.
    Any ideas /sugestions gratefully received as not much hair left on my 
head...........from lots of scratching!

 

        Kind Regards  Dan Gardner   1986 560SEC  220kw  euro