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Removing and cleaning a TD5 MAP sensor

Discussion in 'Technical Archive' started by ratty, Sep 7, 2012.

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  1. ratty

    ratty I'm not special I'm limited edition Global Moderator

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    I haven't cleaned the MAP sensor on my defender for a little while so I thought that it was about time I gave it a spring clean before my holiday. Unfortunately I didn't think about taking any pics until after I've cleaned the MAP so can't show you how gunky it actually was.

    First off you need to remove the three 13mm bolts holding the plastic engine cover on.

    There is one on the offside (drivers side) of the vehicle....

    [​IMG]

    and 2 on the nearside (passenger side).


    [​IMG]

    We can now see the MAP sensor situated alongside the dipstick

    [​IMG]

    Next we need to undo the two 8mm bolts holding the MAP in place. You will need to use a spanner as the bolt nearest the front of the engine doesn't have enough room to get a socket and ratchet on

    [​IMG]

    Gently wiggle the sensor from side to side while pulling and it should ease out. You will then need to unclip the electrical connector by squeezing the plastic tab at the wire end of the plug.

    [​IMG]


    You will then be left with this.....

    [​IMG]


    [​IMG]

    Using Carb cleaner or similar, repeatedly spray and then wipe off until the sensor is clean as in the above pics.

    [​IMG]

    Re-fitting is simply the reverse of the above.
     
    Last edited: Sep 7, 2012
  2. Shifty1962

    Shifty1962 Well-Known Member

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    A simple job that can give big improvements. You should see what they look like on an engine with EGR still (supposedly) working.
     
  3. ratty

    ratty I'm not special I'm limited edition Global Moderator

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    I was surprised how bad mine had got. My landy was starting to get a bit sluggish on hills so I figured it was about that time to give it a quick clean up.
     
  4. 90TD5

    90TD5 New Member

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    Want to do this...

    ...but I'm a pleb.

    S
     
  5. ratty

    ratty I'm not special I'm limited edition Global Moderator

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    What I posted is literally all that you need to do. There are no hidden surprises. As long as you can use a spanner you can easily do this job yourself. The reason for me posting things like this that can be considered basic to some people, is to show peeps like yourself, that aren't overly confident, that it is something within your ability.

    I also try and list the tools required so you can beg borrow or steal what you need to get the job done.
     
  6. blackdog1

    blackdog1 Active Member

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    Thanks for the info, just cleaned mine while my other half made a cup of tea.
     
  7. Shifty1962

    Shifty1962 Well-Known Member

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    Should have got her to clean it while you made the tea :)
     
  8. ratty

    ratty I'm not special I'm limited edition Global Moderator

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    How badly gunked was it?
     
  9. burrito

    burrito Active Member

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    Been meaning to do this for ages so based on your comment I popped out and bought some carb cleaner, and also ordered an EGR blanking kit.
     
  10. Shifty1962

    Shifty1962 Well-Known Member

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    When you take the EGR off you'll see just what crap your engine has been breathing all these years. The inlet manifold will have more oil and tar in it than the Torey Canyon did. Showing my age now.

    I also cleaned out a spare inlet manifold and swapped them over so my inlet was as clean as possible. I can not think of a dirtier job than cleaning out the manifold was. It was bloody horrible.
     
  11. Hamsterberg

    Hamsterberg Well-Known Member

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    Will be doing mine in the morning, thanks for the heads up Ratty
     
  12. burrito

    burrito Active Member

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    Thanks Ratty, it wasn't bad but still black and oily. EGR off next weekend.
     
  13. 90TD5

    90TD5 New Member

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    Ok. Took the car and misses to Norfolk this weekend which, with the weather, was lovely. Will do it this weekend. Look forward to the follow up post everyone.

    S
     
  14. ratty

    ratty I'm not special I'm limited edition Global Moderator

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    After taking mine for a quick spin (I couldn't test drive it when I cleaned it due to parking issues) my power seems to be back to normal again.:)
     
  15. ratty

    ratty I'm not special I'm limited edition Global Moderator

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    After driving my landy around on the isle of wight for the last 3 days I can happily report back that cleaning my MAP sensor was well worth the effort. I am back to full power and my fuel economy seems to have improved too.:)
     
  16. SteveT247

    SteveT247 Active Member

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    Sorry to bring up an old thread but just followed this to clean mine. Easy peasey job and well worth the 10 minutes or so it took to do. The sensor was well "gunged" up. Just took it out for a run after cleaning and it fairly flies through the gears now and torque seems much better. Cheers Ratty, nice one. :D
     
  17. ClassikFan

    ClassikFan Active Member

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    Found this thread yesterday so tonight I was out with my spanners and what did I find? A very gunked up sensor! Looking forward to taking the Disco for a spin friday to see what difference it makes!
     
  18. sierrafery

    sierrafery Well-Known Member

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    you should clean the AAP sensor too(in the airbox)...this one will not have muck on it but it has a small hole which is the access to the sensor itself and used to coloect dust inside... it's even more important for boost than the MAP as the ECU extracts the readimg of this sensor out of the MAP reading to calculate the boost, as the reading from MAP= AAP + boost. Use a syringe filled with white spirit or something not very agressive through that tiny orifice then blow it out with a hairdryer(not on hot)...compresseed air might damage the element
     
  19. RangerSi

    RangerSi Member

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    Just done mine. Slowly working through the MANY problems from years of neglect. Such a difference afterwards.

    I can't load a photo off my phone for some reason, but believe me, it was more grease/oil/muck/dust than sensor.
     
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