Auxilary Air Device
yellow melos - 27/4/09 at 01:04 PM
Hi Guys,
K-Jetronic fuel injection has a auxilary air device which has an electrical connection too it..... is this enectrical conenction just to heat the
biometric strip or does it serve another purpose ???
also whats the easient way of testing it
Cheers
Mr Whippy - 27/4/09 at 01:13 PM
is this it?
The Auxiliary Air Valve -
This item is a device to aid the engine when cold by opening a small port to increase the engine's idle speed. The fast idle control is achieved
by the port being held open by a bi-metalic strip that when heated by it's own heater element, or via natural heat soak from the engine, the port
closes. The voltage supply to the air valve is the same as the feed to the fuel pump and the warm-up-regulator. If it is found that the idle speed
will not reduce and that the speed is maintained artificially high when warm, clamp the rubber pipe between the air valve and the inlet manifold. If
this action causes the engine rev's to return to normal, the fault is within a sticking auxiliary air valve.
It is worth cleaning the valve, lubricating it and re-test it's operation. The internal heater element can also be checked for continuity using a
multimeter.
U2U sent
[Edited on 27/4/09 by Mr Whippy]
yellow melos - 27/4/09 at 01:43 PM
I see, so it's held open by the strip, so if i removed the connector, should close quicker, i am going to clean this up and i do think it's
sticking.
yellow melos - 27/4/09 at 02:06 PM
I don't suppose it matter which way round the connector goes on ???
Mr Whippy - 27/4/09 at 02:44 PM
quote:
Originally posted by yellow melos
I don't suppose it matter which way round the connector goes on ???
nope, makes no difference
rachaeljf - 27/4/09 at 03:02 PM
quote:
Originally posted by yellow melos
I see, so it's held open by the strip, so if i removed the connector, should close quicker, i am going to clean this up and i do think it's
sticking.
Erm, no. If you remove the connector it will stay open and your idle speed will remain high for longer than it needs to be.
The valve closes slowly as the strip is heated by the ignition supply. So, after startup your idle should slowly drop from high to normal. The valve
also relies on engine heat soak to keep it warm. This stops you getting an unwanted fast idle when you start an already warmed up engine. The valve is
meant to be bolted to the block or head to get the engine heat.
yellow melos - 2/5/09 at 09:35 PM
Well i have cleaned the warm up valve but it does close o.k but the engine still runs high ( about 1800 revs, even when warm.
i have completly shut off the warm up regulator and wound in the idle speed screw in but it still idles at around 1200 revs ( engine should not run at
all, does this suggest an air leak ???