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    scraham's Avatar
    scraham Posts: 2, Reputation: 1
    New Member
    		  
    #1

    Aug 9, 2011, 06:31 PM
    Fluxuating idle
    My 2000 honda accord pulses between 1000 and 2000 rpms when it idles. When I drive down the interstate it kind of jerks when I let off the gas. Egr valve is not old. Any ideas what is wrong
    TxGreaseMonkey's Avatar
    TxGreaseMonkey Posts: 16,761, Reputation: 5597
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    #2

    Aug 9, 2011, 06:41 PM

    Air in the cooling system? Open the bleeder bolt and fill the radiator with coolant, until it comes out the bleeder bolt.
    cdad's Avatar
    cdad Posts: 12,700, Reputation: 1438
    Internet Research Expert
    		  
    #3

    Aug 9, 2011, 06:41 PM

    Might be time for a tune up if it has been awhile. Also clean your injectors and replace fuel filter.
    odinn7's Avatar
    odinn7 Posts: 7,691, Reputation: 1547
    Entomology Expert
    		  
    #4

    Aug 9, 2011, 06:44 PM
    Could even be something as simple as a vacuum leak as I have seen these symptoms caused from that before. Really though, it's difficult to diagnose something like this without actually being able to check it out.
    scraham's Avatar
    scraham Posts: 2, Reputation: 1
    New Member
    		  
    #5

    Aug 9, 2011, 07:21 PM
    Would the map sensor have anything to do with the problem
    TxGreaseMonkey's Avatar
    TxGreaseMonkey Posts: 16,761, Reputation: 5597
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    #6

    Aug 9, 2011, 07:43 PM

    No.

    Fluctuating idle rpm is usually caused by vacuum leaks (too much air), which the ECM constantly tries to adjust for--hence, the fluctuations as the engine "seeks" a level. Check for vacuum leaks--examine hoses, Fast Idle Thermo Valve (ensure valve seat is tight), and Idle Air Control Valve (IACV).
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