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fjmuurling

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Posts posted by fjmuurling

  1. The primary injectors are Peak and Hold injectors ie a larger current is used for opening and after reaching the opening current the ECU (which measures the injectorpai current) throttles the current back.

    As the injectors are paired (1&4 and 2&3) the current through an injector pair is evenly distibuted between the 2 injectors if they are of equal resistance. If not then one injector gets more current then the other causing different opening times or not (fully) opening of an injector.

    • Like 1
  2. On 29/06/2022 at 16:26, LotuStuart said:

    Thanks-can you clarify if that is a proven fix, or a suggestion?

    Has it happened to your Esprit too?

    It does not happen in my esprit (mechanical ODO)

    It is more like a suggestion.

     

    The picture above and the posting that when it works it displays the right numbers and my experience with similar failures on LCD displays make a strong case with failing contacts.

    The LCD displays in general are connected to the PCB by solder contacts or by means of rubber conductive strips which are clamped between the display and the PCB.

    Fixing the bad solderjoints is not so difficult.

    If the display uses the "strips" one has to remove in general a (brittle) plastic holder and then the contact points on the pcb can be cleaned with IPA. Another problem that can occur is that the plastic holder for the display is a little bit out of shape and does not apply evenly distibuted pressure / force along the row(s) of contacts.

     

    In both cases you have to open the speedo  

    • Like 1
  3. In the AC request circuit there is also a low pressure switch.

    If the switch behaves erratically (due to faulty switch (connections) or just enough pressure in the system) the AC will be switched ON - OFF - On etc (there is some debounce in the software of the ECU). 

    This can explain the erratic behaviour of the Idle speed, as the ECU wants to set the idle speed for when the AC is ON / OFF

  4. The amount of fluid which has to travel trough the pipe is only dictated by the bore of the master cylinder and the (pedal) stroke. and  is independent of the volume of the pipe.

    A smaller pipe is a little more restrictive flow wise.

    Why not just make up a mockup (won't brake the bank) and see if it works?

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