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    Tom753's Avatar
    Tom753 Posts: 1, Reputation: 1
    New Member
    		  
    #1

    Mar 29, 2010, 03:19 PM
    Why would 1992 Civic Idle poorly when warm?
    I have a 1992 Civic, I believe a DX model. 4 cylinder, auto that idles fine when first started but once warm will cycle between around 2000 rpm and normal idle when ever stopped, this cause the car to surge if the brake isn't pressed fairly hard. Will rev up and down in drive, park, or neutral. The check engine light is on so I assume a bad sensor is to fault, or maybe a vacuum leak. Any ideas or suggestions?
    TxGreaseMonkey's Avatar
    TxGreaseMonkey Posts: 16,761, Reputation: 5597
    Uber Member
    		  
    #2

    Mar 29, 2010, 05:18 PM

    . Check for codes:

    https://www.askmehelpdesk.com/cars-t...tml#post832012

    . Clean the throttle, throttle body, upper & lower ports, and Idle Air Control Valve (IACV):

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

    . Read the link below:

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

    . Replace the Ignition Control Module and coil:

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