Question about 1999 Honda Civic

1 Answer

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

Posted by on

  • 3 more comments 
  • 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.

  • elmer lat Jun 22, 2013

    my honda sedan ph15 engine lack of power

  • 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


1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points


    An expert that got 10 achievements.


    An expert that got 5 achievements.

    Brigadier General:

    An expert that has over 10,000 points.

  • Master
  • 6,966 Answers


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.


1 Suggested Answer

  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.

Posted on Jan 02, 2017

Add Your Answer

Uploading: 0%


Complete. Click "Add" to insert your video. Add



Related Questions:

1 Answer

1!999 civic lxi has rough idle, have replaced servo unit but the idle still rough

I would recommend that you have the throttle body cleaned out, and replace the TPS (throttle position sensor) sensor.

Mar 16, 2011 | 1999 Honda Civic

1 Answer

Under 2000 rpms runs bad/hesitates/check engine light

This IAC valve runs only when your foot is off the gas pedal. Mainly to keep the engine from stalling and keeping it at a safe RPM. If it is running bad under 2000RPM, more than likely its the IAC valve or a vacuum leak. Clean or replace the IAC valve....Hopefully this helps!!

Apr 17, 2010 | 2000 Honda Civic

2 Answers

I have a honda civic vtec vti 1992 when i start it it idles at 5800rpms i have change the iac valve and the map sensor what could it be i have no trouble codes showing

honda prelude 1990 4 spd manual trans ac ls model. accelorates normally and in between all gear changes engine does not slow down to 1000 rpm it remains at 2000 rpm.

Jan 23, 2010 | 1990 Honda Prelude

1 Answer

Rpm drop when open a/c

First of all, a drop in power when AC turned on, is not uncommon due to the fact that it puts quite a noticeable load on a 4 cyl engine, but in saying that your IAC (idle air control motor) should be compensating for the extra load and adjusting idle to normal when this occurs. Try pulling the IAC off & clean it & port it comes out of real good with throttle body spray cleaner, and re-installl it and see if that helps. As far as steering jerking, take a close look at belt condition as well as tension on belt, as it may need adjustment or belt and/or tensioner replaced.

Oct 03, 2009 | 1996 Honda Civic

3 Answers

1997 hoda civic EX idles low

How low is low? Usually should be around 600-650 RPM's. If it is lower than that, look at cleaning the throttle body, and possibly a new IAC motor.

Jul 02, 2009 | 1997 Honda Civic

1 Answer

94 civic erratic idle when warm

either low coolant or your IAC motor is acting up

Jan 15, 2009 | 1994 Honda Civic

1 Answer

1999 honda civic lx automatick

there is a wiring problem with some of them the wire shorts under the intake manifold that runs to the alternater. also the alternator on them seam to have a mind of their own and only work when they HAVE to and test good when load tested replace alt if the wires arent shorted

Dec 31, 2008 | 1999 Honda Civic

Not finding what you are looking for?
1999 Honda Civic Logo

Related Topics:

1,400 people viewed this question

Ask a Question

Usually answered in minutes!

Top Honda Experts


Level 3 Expert

71694 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22082 Answers

Jeff Turcotte
Jeff Turcotte

Level 3 Expert

7031 Answers

Are you a Honda Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides