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Air Idle Control Valve



 
 
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  #1 (permalink)  
Old June 26th 09, 12:14 AM posted to uk.rec.cars.maintenance
Tunku[_2_]
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Default Air Idle Control Valve

Should an engine be able to run with this electrically disconnected, but
still in place?



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  #2 (permalink)  
Old June 26th 09, 07:34 AM posted to uk.rec.cars.maintenance
Duncan Wood[_3_]
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Default Air Idle Control Valve

On Fri, 26 Jun 2009 00:14:42 +0100, Tunku wrote:

Should an engine be able to run with this electrically disconnected, but
still in place?





It depends on how open it sits, almost all the ones I've seen would stall.
  #3 (permalink)  
Old June 26th 09, 07:46 AM posted to uk.rec.cars.maintenance
Peter Hill
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Default Air Idle Control Valve

On Fri, 26 Jun 2009 07:34:03 +0100, "Duncan Wood"
wrote:

On Fri, 26 Jun 2009 00:14:42 +0100, Tunku wrote:

Should an engine be able to run with this electrically disconnected, but
still in place?


It depends on how open it sits, almost all the ones I've seen would stall.


Depends on if the system has a base idle setting device or if the idle
air valve is only source of air. Base idle setting may be an air bleed
screw or the good old hold the throttle open a bit on an adjustable
stop. If system has base idle it will be setup, with the idle air
valve unplugged, to an engine speed slighly short of the target rpm.
Then the ECU uses the idle air valve to bring engine speed up to
target.
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  #4 (permalink)  
Old June 26th 09, 07:48 AM posted to uk.rec.cars.maintenance
Duncan Wood[_3_]
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Posts: 1,212
Default Air Idle Control Valve

On Fri, 26 Jun 2009 07:46:15 +0100, Peter Hill
wrote:

On Fri, 26 Jun 2009 07:34:03 +0100, "Duncan Wood"
wrote:

On Fri, 26 Jun 2009 00:14:42 +0100, Tunku wrote:

Should an engine be able to run with this electrically disconnected,
but
still in place?


It depends on how open it sits, almost all the ones I've seen would
stall.


Depends on if the system has a base idle setting device or if the idle
air valve is only source of air. Base idle setting may be an air bleed
screw or the good old hold the throttle open a bit on an adjustable
stop. If system has base idle it will be setup, with the idle air
valve unplugged, to an engine speed slighly short of the target rpm.
Then the ECU uses the idle air valve to bring engine speed up to
target.



Which means any large electrical load stalls it.
  #5 (permalink)  
Old June 26th 09, 08:04 AM posted to uk.rec.cars.maintenance
MrCheerful
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Posts: 3,314
Default Air Idle Control Valve

Tunku wrote:
Should an engine be able to run with this electrically disconnected,
but still in place


It can still run but may not idle, so you might need some throttle to start
it and keep it going, otherwise it will run alright.


  #6 (permalink)  
Old June 26th 09, 09:50 AM posted to uk.rec.cars.maintenance
Conor[_3_]
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Posts: 481
Default Air Idle Control Valve

In article , Tunku says...

Should an engine be able to run with this electrically disconnected, but
still in place?


Yes although it may not idle, depending on the engine management
system. It's a common fault on my wife's FTO but on hers, they do idle
once hot but will not increase speed at idle to cope with power
steering demands.

--
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looking good either. - Scott Adams
 




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