benyamin.george Posted September 18, 2019 Report Share Posted September 18, 2019 Hey guys having a bit of an issue with a r32 gtr running a link thunder ecu , basically the factory GTR r32 platform has a 12v constant feed to an injector resistor pack which then splits to each of the injectors. The issue I'm having is when I first turn the car to accessories and power up the thunder everything works sweet no issues I can connect to the ecu make changes run the engine etc. As soon as I turn the key off and disconnect power to the ecu the injectors start firing like crazy you can hear them from inside the cabin. Has anyone ran into anything similar or know where to begin? Any help is appreciated Quote Link to comment Share on other sites More sharing options...
Simon Posted September 18, 2019 Report Share Posted September 18, 2019 That catch is going to be the hot feed to the injectors and this combined with an ECU with peak hold capable drives. You need to change the 12V feed to a key switched supply so that power is removed from the injectors at key off. Quote Link to comment Share on other sites More sharing options...
benyamin.george Posted September 19, 2019 Author Report Share Posted September 19, 2019 I have done this to fix the issue already I'm more trying to understand what causes it when the ecu is switched off for example what is the ecu doing when I turn the ignition off to cause the injectors to start firing Quote Link to comment Share on other sites More sharing options...
Brad Burnett Posted September 19, 2019 Report Share Posted September 19, 2019 when you turn the ecu off the injector drives are going to ground. Quote Link to comment Share on other sites More sharing options...
Simon Posted September 19, 2019 Report Share Posted September 19, 2019 If you head to the PC link help file then G4+ ECU Tuning Functions > Auxiliary Outputs > Wiring Auxiliary Outputs there is a section that explains what can happen Quote Link to comment Share on other sites More sharing options...
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