99 Sonata - no power at times

Discussion in 'Hyundai Sonata' started by 99Sonata, May 11, 2006.

  1. 99Sonata

    99Sonata Guest

    I just bought a 1999 2.4L, 4 cyl. Hyundai Sonata.
    Occassionally I step on the gas and the car will barely move, then after a
    few seconds it will start to go. This seems to happen only within the first
    15 minutes of starting the car and when I am taking off from a complete
    stop.
    I have changed the plugs, wires, head gasket, transmission fluid&filter,
    oil fluid&filter,timing belt&crankcase sensor.
    The Engine light is on (solid). The engine code is Error Code:171 Left
    Bank Lean.
    Any ideas?
    Thanks!
     
    99Sonata, May 11, 2006
    #1
  2. 99Sonata

    hyundaitech Guest

    You'll want to check to see if unmetered air (i.e. not going through the
    air flow sensor) is entering the engine. Check the PCV valve hose for
    breaks. Check the hose between the throttle body and the air flow sensor
    to be sure it's installed properly and has no cuts or breaks which would
    allow air to enter.

    If all that is okay, you probably have a problem with your upstream oxygen
    sensor or your air flow sensor.
     
    hyundaitech, May 11, 2006
    #2
  3. 99Sonata

    Matt Whiting Guest

    I'm not sure how an inline 4 can have a "left bank", but I'm not real
    familiar with Hyundai codes. I'd take it to a reputable garage and have
    them take a look. Sounds like you aren't getting sufficient fuel and
    this could be due to a number of problems such as fuel pump, clogged
    fuel filter, fuel injector, sensor error, etc.


    Matt
     
    Matt Whiting, May 11, 2006
    #3
  4. 99Sonata

    hyundaitech Guest

    On inline engines, the codes for "Bank 1" or "left bank" are used, and the
    codes for "bank 2" or "right bank" are not. It's pretty standard
    terminology, but I understand how it can be confusing.
     
    hyundaitech, May 11, 2006
    #4
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