Question about 1999 Honda Civic

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Idling problem when ac turned on honda civic lxi 1999

I have a problem in idling with my honda civic lxi 1999 whenever my ac turns on, my rpm goes down to 600 i already clean the IAC but still the same problem. please help. thanks

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  • Arvin Santos Sep 23, 2008

    Thank you very much, i know those ideas will be helpfull solving this problems, i'll update you once we try those things.

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  • billymalabo
    billymalabo Jul 09, 2013

    My honda civic lxi 96 manual trans is running scratchy when when i accelerate. how can i fix this?

  • texasjoev Aug 08, 2013

    i Have a 1999 honda civic that when iam driving down the road the ac seems to want to fluxuate on the RPMS like the compressor engages and disengages can any one help with this?

  • Anonymous Mar 27, 2014

    honda civic 2000 rpm sudden down when release the gas paddle

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  • Master
  • 6,966 Answers

Hi,

To my knowledge (at least in my country), some Honda Civics have a compensator solenoid the pushes on the throttle that adjust the engine's RPM to its standard idling when the A/C compressor is activated. Technically, this solenoid is nothing more but a coil and a plunger. When the compressor runs, the same relay activates this solenoid and pushes the plunger forward increasing the RPM. Pls check/clean/adjust/replace as deemed fit and necessary.

Hope this be of initial help/idea. Pls post back how things turned up or should you need additional information.

Good luck and kind regards. Thank you for using FixYa.

Posted on Sep 23, 2008

  • Louie  Role
    Louie Role Sep 23, 2008

    Hi again,

    Incidentally, I was made to understand that in some Honda Civic intended or manufacture in and for other countries/regions have an Idle Control Solenoid Valve (ICSV) is used to
    compensate for idle speed reduction due to electrical, or other loads
    on the engine such as the compressor kicking in. The air/fuel ratio during idling is controlled by
    the Electronic Control Unit (ECU, or from 1993-on, Engine Control
    Module, ECM) and various solenoid valves such as idle control, fast
    idle and air conditioning idle control solenoid valves. With the
    exception of the air conditioning idle control solenoid valve, these
    change the amounts of air bypassing into the air intake manifold. The
    air conditioning control solenoid valve opens the throttle when the air
    conditioner is turned on by signals sent from the ECU/ECM.

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