1992 Accord racing idle in park & neutral HELP Plz

Discussion in 'Accord' started by JesseLittle, Mar 19, 2007.

  1. JesseLittle

    JesseLittle Guest

    1992 Honda accord EX 150K ..Idle jumps up & down ( 800-1900 rpm) in
    park & or neutral. Once tranny is engaged it stops racing up & down,
    but is still too high (about 1200 rpm) Dealer can not diagnose..

    After problem occurred I replaced the following. New plugs,
    wires,coil,cap, checked EGR and it seems to work fine,put in brand new
    $50.00 O2 sensor,just did the IAC= idle air control valve ( from junk
    yard since new one is 275.00). pulled fuel rail & cleaned the
    injectors , replaced the rubber gaskets that seat with the injectors.
    No visible or detectable vacuum leaks

    Again when a load is on transmission it stops racing but still idles
    to fast. This is killing my MPG and sounds really bad LOL.

    Any help is very appreciated...I am out of ideas
    JesseLittle, Mar 19, 2007
  2. JesseLittle

    N.E.Ohio Bob Guest

    Probably trapped air in the cooling system.
    Take the radiator cap off, and open the bleeder valve at the thermostat
    housing. Start the car and close the bleeder when all the air stops
    coming out.
    Might be the coolant sensor giving bad info to the computer, but I
    doubt it. bob
    N.E.Ohio Bob, Mar 19, 2007
  3. JesseLittle

    motsco_ Guest


    Bearing in mind the coolant reservoir has to be fairly full before and
    after you do this. If there's no 'reserve' in the reservoir, there's
    nothing to displace any air you want to get out.

    motsco_, Mar 19, 2007
  4. JesseLittle

    jaxson-guns Guest

    You have a bad coolant temperature sensor. That sensor sends info to the ecu
    to increase idle (cold start) and return to normal idle after the coolant
    temperature is at normal operating condition.When it goes bad, your idle will
    fluctuate up and down repeatedly. My Accord went through that, done that.
    Easy fix. Just don't confuse the coolant temperature sensor with the coolant
    sending unit if you fix the problem yourself. Have a good day. Jackson........
    ......Semper Fi.
    jaxson-guns, Mar 20, 2007
  5. JesseLittle

    TE Chea Guest

    | >Any help is very appreciated
    My F20A too had this problem : cause was its throttle angle
    TE Chea, Mar 20, 2007
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