kevin p Posted April 18 Report Share Posted April 18 Hi everyone, Working on an Evo 1, I would like to setup direct fire on the ignition side. I saw that pin 33 is label ignition 3 and fuel solenoid, and pin 38 is label ignition 4 and ecu hold power. Can I attach 3 & 4 coil to the respective pinouts and fire up or are there changes that need to be made in the ecu software as well? Thanks Quote Link to comment Share on other sites More sharing options...
Adamw Posted April 18 Report Share Posted April 18 It is not possible with that ECU, there is extra hardware attached to Ign 4 to control the main relay etc. Quote Link to comment Share on other sites More sharing options...
kevin p Posted April 18 Author Report Share Posted April 18 Thank you Adam. Quote Link to comment Share on other sites More sharing options...
Vaughan Posted April 18 Report Share Posted April 18 With G4X ECUs on the latest firmware (comes with the G5 PCLink install) you can reallocate which ignition and injection drive is used for what so if you can use any of the Ign 5-8 pins on the expansion header as your additional ignition outputs as long as you reallocate them correctly in the Ignition Reallocation table. Example below uses Ignition 1 output for cyl 1 coil, Ignition 2 output for cylinder 2 coil, ignition 5 output for cyl 3 coil and ignition 6 output for cyl 4 coil. Adamw 1 Quote Link to comment Share on other sites More sharing options...
Adamw Posted April 18 Report Share Posted April 18 Ah yes, sorry for the bad info. Im so used to not having that reallocation functionality in our older software and have never needed it so forget it is even there. Vaughan 1 Quote Link to comment Share on other sites More sharing options...
kevin p Posted April 19 Author Report Share Posted April 19 That's ok, at least I know it's possible. I finish tuning the car earlier today and the stock setup so maybe next time. Thanks again. One more thing, I notice when I change it to direct ignition, the ecu hold power was turn off and i got an error message. Quote Link to comment Share on other sites More sharing options...
Vaughan Posted April 19 Report Share Posted April 19 49 minutes ago, kevin p said: One more thing, I notice when I change it to direct ignition, the ecu hold power was turn off and i got an error message. This is because when you change it to direct ignition it will automatically allocate the extra 2 ignition drives which will overwrite anything else using them. After you have set it to direct spark you need to turn on ignition reallocation, set the values in the table to match your planned wiring and then set the ECU hold power and whatever you have on ign 3 up to what they were again. Quote Link to comment Share on other sites More sharing options...
kevin p Posted April 19 Author Report Share Posted April 19 Ok, got it, thanks Quote Link to comment Share on other sites More sharing options...
kevin p Posted April 20 Author Report Share Posted April 20 Can I reallocate the ecu hold power and assign coil 4 to it? Quote Link to comment Share on other sites More sharing options...
Confused Posted April 20 Report Share Posted April 20 No, as has been said before, Hold Power MUST stay on Ignition 4, there's extra physical hardware on the board for this, so it's not suitable for any other purposes. Quote Link to comment Share on other sites More sharing options...
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