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Posts posted by Simon

  1. Its really a 50/50 call from our end. What is critical is that the trigger wheel matches the spec the sensor requires.

    Most issues we see are due to the trigger wheel design not being within the specs recomended by the sensor. Or the mounting brackets bing to light and allowing sensor movement relative to the trigger wheel. 


  2. If its the 16 Valve distributor engine then in the distributor you will have a 24 tooth wheel and a 4 tooth wheel, Best option on this is to remove 3 of the 4 teeth to allow full sequential fuel and ignition.

    Other option is to only use the 4 teeth and set the trigger mode to tooth per TDC mode and sync to none. This is only good for group fuel and distributor ignition.


  3. That was a work around and really only masks another issue.  As if the triggers are correct and behaving as expected trigger errors should not occur. And if they do there is an underlying issue.

    In this case the polarity of the sensors seems to change with RPM this will cause the timing of the set edge to move relative to the crank when the sensor flips polarity.

    To our knowledge this is not normal for Subaru sensors.

    I would suggest trying the sensor from the opposite bank (swap LH sensor in to RH sensor position on the engine) 

  4. Trial and error to confirm the timing in one it will give no sign of running in the other it should get close to firing or actually run if the fuelling is good.

    The 200RPM and No trigger errors is a very good sign that it should be close to being able to fire up.

  5. You need to connect the output of the AEM gauge to the ECU via a free AN volt input or via the CAN bus. 

    If using the 0-5V output of the gauge this could be connected to the original narrow band O2 input  (Pin 56 on ECU plug) if you wish or any other volt input for example one on a XS loom.

    If using CAN then you need to connect CAN L and H from the gauge to the CAN connector on the ECU (A CANPCB cable and CANF plug needed)

    For both the ECU will then need to be configured to suit.




  6. With coil on plug there is only going to be one offset that will allow the engine to run. If you are 360 out it will be firing on the exhaust stroke.

    On the K20 coils make sure you have set the spark edge as falling (not rising as would be used for a distributed Honda)

    Also check that all the cylinders are firing at the correct time.

    Do you have any trigger errors while cranking? Is the RPM reading correct?


  7. Sequential is not really worth the worry as the ECU reverts to group fire above idle.

    I would just do a reload and then check timing. (switches on subboard adjust timing. The more on the more retard.)

    Then adjust master to get a suitable level of fuel at idle and then tune from there.

  8. Its a function in the ECU. On the Digital input there is a calibration figure. Adjusting this allows for different wheel sizes.


    A Digital Input may be connected to an electronic wheel speed or vehicle speed sensor (typically located near the output of the gearbox, or as an output from the vehicle dash board) to enable speed to be calculated.  These Digital Inputs can then be used to configure the Driven and Non-Driven Speed Sources.


      The Calibration number allows the ECU to calculate speed in km/h.


      Note:  In some cases erratic speed signals can occur due to unusual speed signal shapes.  Changing from Rising Edge to Falling Edge or vice versa may help with this problem.  This problem usually presents as random spikes of increased speed.


      Set-up Procedure:   The Calibration number is the number of pulses received over a 100 m distance.


      Method 1:  Drive the vehicle at a known speed and adjust the calibration number until the Vehicle Speed Runtime Value displays correct.


      Method 2:  Wheel Speed Sensors Only.  Calibration Number = (Number of Sensor Teeth / Wheel Diameter) * 31.83.  Note that wheel diameter is in meters (m).


      Typical values for speed calibration numbers range from about 170 to 280. The maximum frequency the digital input can accept is 500 Hz.



      Note:  Wheel Speeds can be checked in the Runtime Values Digital Inputs tab