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Megasquirt EFI wiring install help

 
Old 08-23-2018, 09:32 PM
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Default Megasquirt EFI wiring install help

I have an already built megasquirt EFI ecu with a plug and play harness for my 04 Mazdaspeed miata. I went to get it installed and tuned by my tuner.... it turns out heís not familiar with the software. And Sadly I got it with no instructions but Itís pretty straight forward with the harness to where it plugs into from car to ecu. But my harness also has 5 wires that come out which is supposed to get wired into something else. my tuner is having problems figuring out what the 5 wires are and where exactly they go into. We donít want to **** **** up. So Iím seeing if anyone can help us out or have more info or can provide instructions lol thanks
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Old 08-23-2018, 09:51 PM
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Originally Posted by Jason Peters View Post
I have an already built megasquirt EFI ecu with a plug and play harness for my 04 Mazdaspeed miata. I went to get it installed and tuned by my tuner.... it turns out heís not familiar with the software. And Sadly I got it with no instructions but Itís pretty straight forward with the harness to where it plugs into from car to ecu. But my harness also has 5 wires that come out which is supposed to get wired into something else. my tuner is having problems figuring out what the 5 wires are and where exactly they go into. We donít want to **** **** up. So Iím seeing if anyone can help us out or have more info or can provide instructions lol thanks


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Old 08-23-2018, 10:54 PM
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That might be a braineak build MS3x
https://www.miataturbo.net/miata-par...ssembly-14598/

Instructions are in that post. The wiring is

red = 12v
black = wb02 ground
blue = wbo2 input
yellow = spark c
grey = spark d

I believe you can ignore the yellow and grey.
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Old 08-24-2018, 12:45 AM
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Wow thanks a lot. This is exactly what I needed!
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