caracol Posted September 29, 2012 Share Posted September 29, 2012 (edited) I see so many people having problems with the IACV and solutions that solve some problems but i search in forums and in the web and can't find how it works, what the connections (air pipe and water) do and the function of the servo. If someone knows please share Thanks Edited September 30, 2012 by caracol (see edit history) Quote Link to comment Share on other sites More sharing options...
Swampy442 Posted September 30, 2012 Share Posted September 30, 2012 Idle sensor? As in the idle air control valve? Its not a spring its a servo motor. It has an air pipe from the intake side, water pipes to stop it freezing I assume and a plug. The ECU controls its opening and closing. Quote Link to comment Share on other sites More sharing options...
Twisted Posted September 30, 2012 Share Posted September 30, 2012 (edited) Wouldn't that be the rpm sensor? If you're on about the rpm reading at idle then I would think thats electronic and is adjusted by many factors that relay info to the ECU from multiple sensors. I might be completely missing the point but that's what I'm getting from what you are asking. The idle air control valve seems a common reason why the idle wouldn't be quite right according to this forum Edited September 30, 2012 by Twisted (see edit history) Quote Link to comment Share on other sites More sharing options...
caracol Posted September 30, 2012 Author Share Posted September 30, 2012 (edited) Sorry Swampy and twisted my bad yes its the IACV and this tread i start its to know how does it works. Thanks ps. I already change the name to IACV in the other post i made. Edited September 30, 2012 by caracol (see edit history) Quote Link to comment Share on other sites More sharing options...
Ian C Posted September 30, 2012 Share Posted September 30, 2012 It supplies the engine with air when the throttle plate is shut. It's a stepper motor that twists a tapered plug in and out of a hole on the intake manifold - the further in the plug goes, the less air can get past into the engine. The ECU controls the precise position of the stepper motor to supply the engine with the amount of ait it needs to idle. This varies depending on the engine temperature and what accessories you're running, e.g. heated rear screen, lights. There is an engine coolant feed to it to stop it icing up in extreme weather, and there is a fancy rubber one way flap to stop pressurised air escaping under boost, and that's about it -Ian Quote Link to comment Share on other sites More sharing options...
caracol Posted September 30, 2012 Author Share Posted September 30, 2012 So if we have one dirt filter plug to the IACV we can have idle issues. Mine was a little dirty People thanks for the help Quote Link to comment Share on other sites More sharing options...
Ian C Posted October 1, 2012 Share Posted October 1, 2012 Sticky idle control valves are fairly common, take it off and cover it in brake cleaning spray Quote Link to comment Share on other sites More sharing options...
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