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    martinjj's Avatar
    martinjj Posts: 1, Reputation: 1
    New Member
    		  
    #1

    Oct 10, 2009, 05:20 PM
    1989 accord idle flux
    I have a 1989 honda accord lxi (125000 mi), the idle is fluctuating from 700-2000 rpm when the engine is warm. When it is cold it idles @ about 2000. Is there anything I can do or should I take it in for service. Also it does this intermittantly.another problem I have is that when the idle is normal and I turn the fan on or hit the brakes the idle drops below 700 rpm and is really rough. Thank you for any help you can give
    TxGreaseMonkey's Avatar
    TxGreaseMonkey Posts: 16,761, Reputation: 5597
    Uber Member
    		  
    #2

    Oct 10, 2009, 07:39 PM

    . Clean the Idle Air Control Valve (IACV):

    https://www.askmehelpdesk.com/cars-t...ml#post1054149

    . Replace the Ignition Control Module (ICM) and coil:

    https://www.askmehelpdesk.com/cars-t...tml#post265896

    See if this explains your situation:

    https://www.askmehelpdesk.com/cars-t...tml#post260436

    I recommend replacing the ICM and coil every 120,000 miles or 10 years, whichever comes first. The ICM, particularly, is a problematic component.

    . Adjust the idle speed to spec.

    . Read this link, if the problem persists:

    https://www.askmehelpdesk.com/cars-t...tml#post842969

    Carefully read Section 5f and other information on Alternator FR Signal. It may indicate the alternator needs replacing.
    KISS's Avatar
    KISS Posts: 12,510, Reputation: 839
    Uber Member
    		  
    #3

    Oct 10, 2009, 07:42 PM

    It might also be a big vacuum like like the power brake booster diaphram.
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