[W126 Coupe] Re:IDLE AIR VALVE VOLTAGE

[Dan Gardner]

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

 



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