Question about 1996 Ford Explorer

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1996 ford explorer w5.0l motor, cant find the PFE sensor valve!

96 ford expl does any one know where the :Pressure feedback sensor.autozone says its on thee firewall i cant find it. ibought from a friend who put another motor in 2 yrs ago and idoint think they reinstalled the pfe sensor.shouldnt there be a tube coming off the ehaust manifold to the pfe?there is no tube.wont pass inspection because computer says egr valve not opening,i took off egr ang applied vacuum and it works fine.ihave made sure the vacuum regulator is working so it has to be the PFE sensor right .can i add pfe sensor to motor.there is a cap on one of the exaust manifolds,i could probably use this port to run tube but where do i go from there. Thanks Danny

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  • Danny Ponder Jul 31, 2009

    To radd69 I know for sure that the 96 modle has the pfe not the dpfe and the difference is pfe has only one tube inlet i used to have a 94 model that had the dpfe so i know what thy look like, an easy find so thanks so far please feedback,Danny

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On the explorer the tube running to the egr valve should have two rubber hoses running off it going to the dpfe sensor, (the exhaust pressure sensor),try looking there and if it is not there mesg me back and i will be sure to find it for you.


Posted on Jul 31, 2009

  • radd69 Aug 01, 2009

    Oops sorry the 96 explorer does not have a pfe sensor or a dpfe sensor. it is computer controlled, here is a section from one of the books i have,

    1996 Aerostar/Ranger/Explorer

    EGR Valve — Explorer 5.0L
    The sonic EGR system that is used on 5.0L engines consists of an EGR
    valve sensor , EGR vacuum regulator solenoid , EGR valve,
    powertrain control module (PCM) , and connecting wires and vacuum hoses.


    The PCM outputs a duty cycle to operate the EVR solenoid. The EVR solenoid
    responds by delivering some of the manifold vacuum it receives to the EGR valve,
    and vents the rest to the atmosphere. The EGR valve, then opens allowing exhaust
    gases to enter the intake system. As the EGR valve opens, it causes the EGR
    valve sensor to move in direct proportion to the EGR valve opening. Because this
    EGR system is a sonic flow system, the EGR valve sensor signal to the PCM is
    used as an indication of the amount of EGR flow into the engine. The PCM uses
    this feedback to adjust the EVR solenoid duty cycle and achieve the desired EGR
    flow.





    The EGR systems used on 2.3L, 3.0L, and 4.0L engines are differential
    pressure feedback EGR (DPFE) systems. DPFE is a subsonic closed loop EGR system.
    The DPFE system:



    • The DPFE system uses EGR backpressure transducer as the feedback
      device.

    • Varies controlled pressure by the valve movement using vacuum output of the
      EGR vacuum regulator solenoid.

    • Uses the EGR valve only as only as a pressure regulator, rather than a flow
      metering device.

    • Allows for a more accurate assessment of EGR flow requirements.

    • Directly monitors the pressure drop across the metering
      orifice.








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