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Camshaft Position Sensor?

Discussion in 'Stock 1995 - 2001 Explorers' started by Lazzman, March 13, 2007.

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    1. Lazzman

      Lazzman Well-Known Member

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      Does anyone know how many Cam position sensor a 4.0 sohc motor has?

      I know there is one on the top of the driver side valve cover but is their another one somewhere?

      Thanks
       
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    3. 410Fortune

      410Fortune ELITE BRONCO2ERER Moderator Emeritus

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      yes there is another on the back of the engine block just like the earlier OHV
       
    4. Lazzman

      Lazzman Well-Known Member

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      Thanks 410 I thought so. Different auto parts stores were giving me different parts.

      Is the rear one visible? How hard is it to locate?
       
    5. zubi

      zubi New Member

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      If its like my 1996 4.0, its not visible to the bare eye, you need a mirror. I just replaced mine, what a pain, no room!!
       
      Last edited: March 15, 2007
    6. Lazzman

      Lazzman Well-Known Member

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      Do you have the SOCH or OHV?

      Why does the sohc motor have two Cam position sensors? One on the valve cover and one in the back of the engine?
       
    7. 410Fortune

      410Fortune ELITE BRONCO2ERER Moderator Emeritus

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      It has two because one is used to startup in the traditional manner, to engage spark timing and fuel injector firing (tells the computer the engine is rotating) and the valve cover mounted sensor is for the actual cam signal and position to the computer so it can control/monitor valve timing.

      probably because the OHV had one on the back of the engine, driven by the oil pump, and the SOHC has a "dummy" cam still in the top of the block

      Your second sensor is on teh back of the engine, above the transmission spine, behind the upper intake manifold, a real PITA to access without removing the intakes

      We know all this because of Brett's SOHC conversion using the OHV computer to run things (his valve cover mounted cam sensor is hooked up to nothing)
       
    8. Lazzman

      Lazzman Well-Known Member

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      So your saying that it makes no sense to replace the valve cover mounted Cam sensor?
       
    9. aldive

      aldive Elite In Memoriam

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      Lazz, do you have problems withthe cam sensor?

      How did you determine it?
       
    10. Lazzman

      Lazzman Well-Known Member

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      With a scan tool.
       
    11. Lazzman

      Lazzman Well-Known Member

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      Somebody is mistaken here. The Ford dealer told me that there is only one cam position sensor for the sohc v6 engine and it is mounted on the valve cover.

      The OHV V6 has the dummy cam sensor where the rotor was. Also my Ford manual only shows one Camshaft position sensor.

      Does anyone know the truth? Is it one or two?
       
    12. aldive

      aldive Elite In Memoriam

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      There is one.
       
    13. Lazzman

      Lazzman Well-Known Member

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      Thanks AL :thumbsup:
       
    14. matz162008

      matz162008 New Member

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      where is it at on a 4.0 ohv?
       
    15. 410Fortune

      410Fortune ELITE BRONCO2ERER Moderator Emeritus

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      Allright listen up people

      94+ OHV has a cam sensor, it is located at the back of the upper intake manifold:

      the 97-2004 SOHC has this sensor ALSO and the valve cover mounted sensor.

      There is no CAM/lifters/pushrods in the SOHC where the OHV cam used to be BUT there is a DUMMY cam in there because this is what drives the oil pump.

      I am not sure about 2005+ but I am gonna go out on a limb and say its still there.....

      The SOHC definatley has two cam sensors, one is actually used to tell the computer the over head cam position/speed/etc the one on the back of the block is still only used for initial start up.

      When Brett did his SOHC conversion he had to make some wiring changes to accomodate the oil pump shaft mounted 2004 SOHC cam sensor, completely ignoring the valve cover mounted sensor because he is using a OHV computer.

      I believe I already said all this, but um yeah if your Ford dealer says there is only one well then there must only be one, right? Dont lsiten to the people who actually pull these engines and work on them or with them, listen to the parts guy at the counter! hahahaha

      both OHV and SOHC have a cam sensor mounted right here:
      [​IMG]
       
    16. Lazzman

      Lazzman Well-Known Member

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      Thanks for clarifying 410 :thumbsup:

      How in the hell do you replace that one? Just the sensor not the whole shaft assembly? That space looks way tight when the engine is mounted in the truck.

      Thanks for any help.
       
    17. 410Fortune

      410Fortune ELITE BRONCO2ERER Moderator Emeritus

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      remove everything down to the upper intake manifold then you can pull it out of the block.

      Space is tight.
      I was actually able to install one without removing the upper intake but the engine was basically bare aside from that and I did it mostly by feel
       
    18. CDW6212R

      CDW6212R Elite Explorer

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      Jamie, does this look familier, this is the back of my 99 SOHC?
       

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    19. tmh6202

      tmh6202 Active Member

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      Cam Sensor

      Sorry to disagree 410, but like CDW's 99, my 98 SOHC has only one on the valve cover. No sensor on the rear of the block for start up or any other purpose. (See photo) However, there is something in the top center of the block which could be a sensor, but not for a cam since they are in the heads.(see photo2)

      Also, the "dummy" camshaft is a jackshaft that runs the oil pump and the rear timing chain on the passenger side of the engine. Which runs through the block right under this "thing" on the block. Note that the old distributor hole is capped and bolted, the head of the bolt is visible under the crankcase vent filter box.

      Mr. H.
       
      Last edited: April 8, 2007
    20. aldive

      aldive Elite In Memoriam

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      Same on my '99.
       

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