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F4i taillight wiring

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Old Nov 17, 2023 | 12:43 AM
  #11  
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Heh, that's making progress salvaging dead bike! They are such good bikes, many destroyed through neglect. Sad really, so glad you're bringing it back!

Starter circuit is completely separate from EFI system. So you can remove ECU, relays, pump, injectors, ignition-coils, plugs, etc. and starter will crank engine merrily all day long.

Ok, if ECU won't prime pump, it won't fire injectors or sparks either, so you'll want to start as high upstream as possible. Start at beginning of my guide with battery and go from there. Most likely you'll find problem in first couple steps with one of relays not working properly or ECU sensing fault-condition and not activating relays. That's typically where power-flow to pump and injectors stops.
 

Last edited by dannoxyz; Nov 17, 2023 at 01:12 AM.
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Old Nov 17, 2023 | 09:26 AM
  #12  
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Yea, what he said.
 
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Old Nov 17, 2023 | 11:04 PM
  #13  
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Originally Posted by dannoxyz
Heh, that's making progress salvaging dead bike! They are such good bikes, many destroyed through neglect. Sad really, so glad you're bringing it back!

Starter circuit is completely separate from EFI system. So you can remove ECU, relays, pump, injectors, ignition-coils, plugs, etc. and starter will crank engine merrily all day long.

Ok, if ECU won't prime pump, it won't fire injectors or sparks either, so you'll want to start as high upstream as possible. Start at beginning of my guide with battery and go from there. Most likely you'll find problem in first couple steps with one of relays not working properly or ECU sensing fault-condition and not activating relays. That's typically where power-flow to pump and injectors stops.
Thank you for this. I ran the pump direct to battery and still nothing. So im going to order a pump and likely still have to trace the issues back to get it running.
 
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Old Nov 22, 2023 | 07:16 PM
  #14  
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I should have started with the pump 🤦‍♂️… ordered a new one and it started up right away!!! 🥳
 
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Old Nov 23, 2023 | 08:07 AM
  #15  
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That happens. Start at one end of the issue ad it's always onthe other.

Glad it running, now we ned some pics!
 
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Old Nov 23, 2023 | 05:35 PM
  #16  
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Woohoo good job!!
 
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Old Nov 23, 2023 | 10:35 PM
  #17  
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Now that i knownit runs its getting stripped for paint and ordering parts 😂
 
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