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maf sensor

  1. Cold air intake causing cel to come on

    1.8 Liter Turbo
    I just installed a k&n cold air inake on my 2002 1.8L turbo beetle. Now my check engine light is constantly coming on. It is throwing code po171 (system too lean, bank 1). I installed the enclosed small air breather on the secondary air pump hose end that disconnected from the stock airbox...
  2. fuel pump relay wont stay on ....???

    1.8 Liter Turbo
    2001 beetle 1.8t, relay will activate for 3 seconds when the ignition is on, then turns off by it self, cutting off the 12v required to activate the fuel pump, maf and oxygen sensor. Also, when I turn on the ignition, the fuel pump will activate and sometimes there is no response. I checked the...
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