'89 240.... occasional loss of power

Discussion in 'Volvo 240' started by Perry Noid, Jan 21, 2004.

  1. Perry Noid

    Perry Noid Guest

    one of the problems I've had with my 240 wagon since buying it 3 years ago
    has been occasional episodes of loss of power. Generally, it runs great, but
    sometimes there's just nothing there, the engine stumbles, no acceleration,
    etc. The only thing I've found that fixes it is to pull over, shut the
    engine off, pop the hood, and work the connector to the Mass Air Sensor on
    and off several times. When I restart, the car is ok again. The problem
    occurs at random (hot, cold engine, warm, cold, wet, dry day, first startup
    of the day or after several stops for errands). The plugs and plug wires are
    new, Air filter replaced every other oil change, Flame trap cleaned
    regularly, along with checking vacuum hoses. The fuel pumps and filter were
    replaced (probably unnecessarily) a little over a year ago. The connector to
    the Air Mass Sensor seems to be free of corrosion, and I've cleaned the
    contacts with some PRO-GOLD contact treatment. The "fix" can last hours,
    days, even weeks, but the problem returns... any other thoughts?

    m9876c at yahoo dot com
     
    Perry Noid, Jan 21, 2004
    #1
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  2. Perry Noid

    James Sweet Guest

    Perhaps cracked solder joints within the air mass meter itself? The fact
    that fiddling with the connector seems to fix it for a while suggests
    something in the vicinity, or perhaps it's just a coincidence and having the
    engine off for a moment is what fixes it.
     
    James Sweet, Jan 21, 2004
    #2
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  3. Perry Noid

    Perry Noid Guest

    sounds like a new air mass sensor might be in order!... Could also be the
    harness, although the wires look to be in good shape, no obvious wear or
    strain.....

    any idea if the sensor can be opened to resolder? My guess is that it's a
    sealed unit, and probably not cheap!
     
    Perry Noid, Jan 22, 2004
    #3
  4. Perry Noid

    James Sweet Guest

    I think it can be opened actually, I'm about to find out as I have a dead
    one sitting out in the garage. I can verify though that it isn't cheap, it's
    about $500 from the dealer, but I've seen remanufactured units for around
    $250. I usually buy them when I find them at junkyards for $20.
     
    James Sweet, Jan 22, 2004
    #4
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