1991 240 computer codes....HELP...

Discussion in 'Volvo 240' started by jsegura525@aol.com, Mar 15, 2007.

  1. Guest

    Hello,
    My 91 240 check engine light is on. I checked the codes and it keeps
    coming up as..
    231, 221, 113, 221 over the last week or so. I switched the Air Mass
    Meter and the
    Oxygen Sensor with my other 240 and it did not help, the check engine
    light is still on.
    When I clear the codes and start the car, the light comes on in about
    one or two seconds.
    I was wondering if anyone has a clue for me.... fuel pump? fuel
    filter? fuel pressure?
    She drives okay, idles high and seems to eat too much fuel.

    Please help...
    Joseph Segura
     
    , Mar 15, 2007
    #1
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  2. > 231, 221, 113, 221 over the last week or so.
    > I was wondering if anyone has a clue for me.... fuel pump? fuel
    > filter? fuel pressure?
    > She drives okay, idles high and seems to eat too much fuel.
    >
    > Please help...
    > Joseph Segura



    2-3-1 = Fuel system compensating for rich or lean mixture.
    I had this one. It turned out to be a stuck idle control valve. Cleaned
    it out and worked fine since.

    2-2-1 = Fuel system compensating for extremely rich or extremely lean
    running condition at cruise.
    You may have some vacuum leaks or cracks in the intake boot. Check where
    the hoses connect. could also be the O2 sensor.

    1-1-3 = fault in fuel injectors.
    Oh oh. Could be a number of things here. Seals, dirt, wiring...and gasp
    the ECU.


    Hope this helps.
    Steve T. Slade
    1990 245
     
    Steve T. Slade, Mar 15, 2007
    #2
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  3. Duane Guest

    In general: High idle is too much air or not enough fuel.
    Low idle and stumbling is too little air or too much fuel.

    You have a high idle with high fuel consumption. Kinda hard to achieve
    under the general rule. So you may have multiple problems.

    Make sure you have NO vacuum leaks, anywhere, and the AC control is OFF. AC
    control kicks the idle to 1000RPM.

    The excessive gas consumption might be a bad ECU temp sensor. Best checked
    at the connector to the ECU. Or rare, bad fuel pressure regulator.

    Since you have a 113 code, as part of a preliminary check, loosen, clean the
    terminals and tighten the two 10mm size nuts with wires underneath them on
    the intake manifold. These are the grounds for the ECU and the injectors
    and the reference ground for the ECU. Any electrical fault with the ground
    will not allow the injectors to function properly.

    Duane
     
    Duane, Mar 16, 2007
    #3
  4. James Sweet Guest

    Duane wrote:
    > In general: High idle is too much air or not enough fuel.
    > Low idle and stumbling is too little air or too much fuel.
    >
    > You have a high idle with high fuel consumption. Kinda hard to achieve
    > under the general rule. So you may have multiple problems.
    >
    > Make sure you have NO vacuum leaks, anywhere, and the AC control is OFF. AC
    > control kicks the idle to 1000RPM.
    >
    > The excessive gas consumption might be a bad ECU temp sensor. Best checked
    > at the connector to the ECU. Or rare, bad fuel pressure regulator.
    >
    > Since you have a 113 code, as part of a preliminary check, loosen, clean the
    > terminals and tighten the two 10mm size nuts with wires underneath them on
    > the intake manifold. These are the grounds for the ECU and the injectors
    > and the reference ground for the ECU. Any electrical fault with the ground
    > will not allow the injectors to function properly.
    >
    > Duane
    >
    >



    If there's a junkyard nearby grab a spare fuel pressure regulator,
    they're cheap used, kinda pricey new, and the easiest way to diagnose
    one is to swap in a different one.
     
    James Sweet, Mar 16, 2007
    #4
  5. Guest

    Re: 1991 240 computer codes....HELP...

    On Mar 15, 8:28 am, wrote:
    > Hello,
    > My 91 240 check engine light is on. I checked the codes and it keeps
    > coming up as..
    > 231, 221, 113, 221 over the last week or so. I switched the Air Mass
    > Meter and the
    > Oxygen Sensor with my other 240 and it did not help, the check engine
    > light is still on.
    > When I clear the codes and start the car, the light comes on in about
    > one or two seconds.
    > I was wondering if anyone has a clue for me.... fuel pump? fuel
    > filter? fuel pressure?
    > She drives okay, idles high and seems to eat too much fuel.
    >
    > Please help...
    > Joseph Segura


    THANKS FOR THE RESPONSES ALL OF YOU HELPFUL PEOPLE.
    I THINK I FIXED THE CHECK ENGINE LIGHT ISSUE....WHAT I DID WAS
    REMOVE AND REPLACE THE FUEL PUMP FUSES (2) AFTER ABOUT
    TEN SECONDS...THE LIGHT IS NOW OFF.....AND I AM A HAPPY MAN.
    I READ THAT THIS MAY HELP AND IT WILL RESET THE FUEL PUMP
    MEMORY...CHEERS TO YOU ALL..
     
    , Mar 16, 2007
    #5
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