96 ex stalling while idling

Discussion in 'General Motoring' started by lrego, Jan 16, 2005.

  1. lrego

    lrego Guest

    A friend of mine has a 96 ex and says when the engine is hot and he is
    idling at a long traffic light sometimes the engine will just start idling
    really rough and then stall out. He starts the car and it's ok. Sometimes
    for the rest of the day. This happens more when it's hot. The car has
    120K. No check engine light on and scanner shows no codes. What could be
    causing this? Thanks Larry
    lrego, Jan 16, 2005
  2. lrego

    Jason Guest

    There are several possibilities. The best place to start would be to do a
    complete tune-up. If your friend does not know how to do it, he should
    have his favorite local mechanic or the local Honda shop mechanics do it.

    If he does not want to do that--tell him to go to a auto parts store like
    Auto Zone and get a can of chemicals that he pours into a full tank. The
    chemicals clean all items related to the fuel system--especially the
    injectors that can easily get clogged and cause all sorts of problems.
    Jason, Jan 16, 2005
  3. If it comes down to blind shotgunning of parts, I would start with the "main
    relay" for about $50 at NAPA. I'm not sure how hard it is to get to on the
    '96 (it is about an hour's job on my daughter's '93), but it is notorious
    enough for symptoms like this that it is a good suspect. The rough running
    before stalling, then works okay when restarted is especially suspicious for
    the main relay. In addition, lack of a "check engine" light suggests the
    problem is one the ECU has no knowledge of - often something between the ECU
    and the spark or between the ECU and the fuel spray. Fading away always
    makes me think loss of fuel pressure (ignition failure is more often like
    hitting a switch) and the immediate return of normal operation suggests the
    fuel pump itself isn't dying. The main relay is cycled every time the car is
    started, so it gets my "evil eye" award for this one. In addition, the age
    of the car makes sense for the main relay.

    I replaced the one in her '93 a couple weeks ago after resoldering it a few
    months ago. I am a new convert to the "replace if possible, resolder if you
    can't replace" crowd.

    Michael Pardee, Jan 16, 2005
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