Guido Posted February 10, 2023 Report Share Posted February 10, 2023 Does anyone have any electrical info on those coils? Specificly the needed drive current. As the G4+ can only drive 20mA i wonder if this is enough or that i need to add pull-ups. Getting massive misfires Dwell is +2ms so should be ok. Guido Ignition Outputs G4+ ECUs offer up to eight independent ignition drives which can be used in a wide range of configurations from a basic distributor set-up through to more complex multi-coil arrangements. Unused ignition channels can be used for additional auxiliary outputs (simple switching functions only). Direct spark, wasted spark and distributed ignition configurations are supported. G4+ Ignition Specifications: Ignition Drive High 20mA @ 5V Ignition Drive Low 2A over current protected Open Collector (not fly-wheeled) in auxiliary output mode. Quote Link to comment Share on other sites More sharing options...
Adamw Posted February 10, 2023 Report Share Posted February 10, 2023 G4+ has no worries driving those coils. They have an impedance of about 330ohm so will pull about 15mA at 5V. Somebody has been very conservative with the 20mA quoted in the help file, I have even done those coils wired in pairs for wasted spark before - so at least 30mA. Actually out of interest I just done a quick simulation of the G4+ ign drive circuit, it should be capable of about 52mA at 5V per drive, and those coils will trigger right down to about 3V so lots of headroom. Quote Link to comment Share on other sites More sharing options...
Guido Posted February 11, 2023 Author Report Share Posted February 11, 2023 Thanks, Guido Quote Link to comment Share on other sites More sharing options...
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