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Thread: Bush repair on electronics!

  1. 1st May 2013, 07:43 PM #1
    awabbit6's Avatar
    awabbit6
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    Bush repair on electronics!

    Not Landy related, but I thought some of you might appreciate the "repair" I did on my wife's Alfa on the weekend.

    Over the last few weeks, the little red 156 has been cutting out at idle. My wife discovered that as it cuts out, she can keep it running by stabbing the accelerator. Has to be the throttle position sensor I reckon.
    So Sunday afternoon, I pulled the TPS (which incorporates the idle motor) off and discovered the back of it had fallen off!



    The back of the TPS supports the back end of the shaft that runs the potentiometer, so without it, the shaft is flapping around and giving irregular signals.
    I couldn’t find the missing piece hanging off the engine anywhere, so my solution … make a new one out of 3mm MDF!





    I used a little bit of graphite powder to lubricate the shaft and some silastic to hold the new back in place (it’s a neat press fit). I put it all back together and the car has been driving perfectly ever since!

    Who says you can’t do a bush repair on modern computer controlled engine electronics!!!!
    -- Paul --


    | '99 Discovery Td5 5spd man with a td5inside remap | doesn't know what it is in for ...
    | '94 Discovery Tdi 5spd man | going ... GONE
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  2. 2nd May 2013, 06:48 AM #2
    ozetim
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    well done. That's got to be worth a few brownie points with SWMBO
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  3. 2nd May 2013, 07:10 AM #3
    crash
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    Good idea, well done.
    I hope you sealed the MDF well.
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  4. 2nd May 2013, 07:20 AM #4
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    87County
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    Excellent fix - well done

    If the hole in the mdf wears you could bush it with a small nylon or plastic ferrule, but there would be very little stress there and it will probably see out the life of the motor car.



    also as addendum to this bush mechanicking tip:


    if that kind of TPS is removed, it can be awkward to refit in the exactly correct position...

    by purely trial and error I found out that if the car battery is disconnected, the TPS seems to reset itself (at least it does on a '90s nissan) - probably the ECU rests to some degree, duly resetting the TPS
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  5. 2nd May 2013, 12:36 PM #5
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    loanrangie
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    A piece of 3mm perspex/ acrylic would be a near permanent repair.
    MY08 TDV6 SE D3- permagrin ooh yeah
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