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Trigger EMU classic

emil_street

New member
Joined
Aug 25, 2023
Can enyone share primary trigger settings for original 60-2 trigger wheel With the original vr sensor. Can’t get it to work, and om all out of ideas.
Best reguards
 
Is it just triggering at the wrong time, or not reading at all?
How have you wired it? You've confirmed the wiring at the sensor is correct, and you're grounding the shield to the ECU sensor ground?
 
I'm not familiar with the ECUMaster setup, but in general, it should be:
- VR type sensor, with no pullup resistor
- Sensor has 3-pin connector: 1&2 are the sensor (~200ohms across pins) and 3 is the shield
- Tooth #1 angle, the first tooth after the gap, is ~87degrees BTDC
- For the trigger edge, pick one and it should be close enough to start. With fixed 10degree timing, rev it up and watch the timing with a timing light. If the timing moves with increasing rpm, try the opposite trigger edge.
- There should be some sort of tooth or ignition logging available with ECUMaster - can you try it and post a picture?
- Note: for MicroSquirt installs, a 10K resistor across the VR+/VR- wires is often needed to prevent problems at higher RPMs (but may make starting more difficult)
 
Is it just triggering at the wrong time, or not reading at all?
How have you wired it? You've confirmed the wiring at the sensor is correct, and you're grounding the shield to the ECU sensor ground?
It’s not reading at all. 1 goes to primary trigger 2 to sensor ground och the shield is grounded on the engine.
 
With ECUmaster they want sensor shields terminated at the ecu side to the sensor ground. I've set up a couple on redblocks and one on a whiteblock this way with stock sensors and it works well.
 
With ECUmaster they want sensor shields terminated at the ecu side to the sensor ground. I've set up a couple on redblocks and one on a whiteblock this way with stock sensors and it works well.

To elaborate further on this with shielded wiring you only terminate the shield / drain at the controller or source and the field end is left isolated from earth or common aka floating. This is so any emf or induced currents get drained at the source and don't interfere with your signal. Terminating the shield on both ends makes it act as another conductor and can play hell with your signals.

I've had to troubleshoot countless 4-20mA analog and RS485 circuits that don't work or send bad data and it's almost always due to issues with the shield / drain being miswired in the field.
 
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