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#1 | ||
Starter Motor
Join Date: Sep 2006
Posts: 2
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Hi,
recently bought a 93 KH laser auto, engine runs well except that when the air con is turned on the engine revs high and I can feel accelerator peddle pushing in by itself.... any thoughts of what would cause this? Thanks |
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#2 | ||
growing up is optional
Join Date: Feb 2006
Location: Gawler area SA
Posts: 3,303
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Assuming its carby, not EFI. There is an idle up mechanism on the back of the inlet manifold towards the passenger side. Its a 2 port vacuum diaphragm that controls the idle up for electric load (headlights etc) and also the A/C system. It is adjustable. Hard to explain without having the car in front of me. Post a pic of the inlet manifold from the LHS with the air cleaner removed and I'll point out the adjuster.
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#3 | ||
What a performer!
Join Date: Jul 2005
Location: SA, Northern Suburbs
Posts: 599
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You'll always get higher RPM with the air-con on, it's the way the engine deals with the extra few kW taken from it to power it. Not sure if it's the same with newer cars but sure is with ours. Should jump no more than 100-150RPM though.
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1981 Ford Laser KA :: E5 :: 2002-2003 1989 Ford Laser KE TX3 :: BP :: 2003-2007 75fwkW 1990 Ford Laser KF TX3 :: BP :: 2010-2011 1991 Ford Laser KF TX3 :: BP-T :: 2011-2015 109fwkW 2007 Ford Falcon BF XR6 Turbo Ute :: Barra 245T :: 2014-2019 324rwkW 1998 Ford Falcon AU XR8 Ute :: Windsor V8 :: 2019-2020 2008 Ford Fiesta XR4 :: Duratec 150 :: 2021-* 1998 Ford Falcon AU XR6 :: HP Intech :: 2021-* |
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#4 | ||
Starter Motor
Join Date: Sep 2006
Posts: 2
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Thanks! Have found the adjustment screw and all is good. Much appreciated!
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