Frank B Posted January 24, 2019 Report Share Posted January 24, 2019 1- i installed my link g4+ on a subaru v6 sti but i cant disable the fuel pump with the controls or the fuse on engine bay when i switch the fuel pump to ON it prime for 3 s and turn off as expected but if i turn the ignition off, kill power to fuel pump, remove fuel fuse and turn back on it will still prime, this is not normal i have the pump set as per factory base map aux 1 fuel pump polarity low any one have encounter a similar issue? regards Quote Link to comment Share on other sites More sharing options...
Adamw Posted January 24, 2019 Report Share Posted January 24, 2019 Im not sure if I follow what you are saying. So it primes then stops when you first turn the ign on, but if the engine is started then turned off the pump keeps running? Is that what you are saying? Quote Link to comment Share on other sites More sharing options...
Frank B Posted January 24, 2019 Author Report Share Posted January 24, 2019 not exactly on a subaru if you want to kill the fuel pump for lets say a compression test you disconnect a pink fuse now with the link nothing happened if i remove the pink fuse like if the fuel pump relay is taking electricity from another place Quote Link to comment Share on other sites More sharing options...
Adamw Posted January 24, 2019 Report Share Posted January 24, 2019 I wouldnt have the faintest idea what the pink fuse does or how it is related to the fuel pump circuit. So all you want to be able to do is disable the fuel pump? You can just set aux 1 to off to do that. Quote Link to comment Share on other sites More sharing options...
Frank B Posted January 24, 2019 Author Report Share Posted January 24, 2019 the pink fuse its the fuse for the fuel pump relay on the subaru i could disable using aux 1 but thats not the way it was from factory i dont know if this is something normal when you install the link this is my map Subaru WRX V5-6 G4+ Xtreme Plugin frank ra 4 inj setup.pclr Quote Link to comment Share on other sites More sharing options...
Adamw Posted January 24, 2019 Report Share Posted January 24, 2019 The ECU only supplies a ground to the fuel pump relay, exactly the same as the stock ecu. I dont know where the fuel pump relay gets its power from in the car but it is not from the ECU. It appears your power does not come from the pink fuse if it still works with the fuse pulled. Quote Link to comment Share on other sites More sharing options...
Frank B Posted January 24, 2019 Author Report Share Posted January 24, 2019 it is necessary to disable hold ecu power when changing from isc stepper to isc solenoid? Quote Link to comment Share on other sites More sharing options...
Adamw Posted January 24, 2019 Report Share Posted January 24, 2019 No, you can leave as is. I would probably just set the keep alive time (under ECU hold settings) to zero. Quote Link to comment Share on other sites More sharing options...
JMP Posted January 24, 2019 Report Share Posted January 24, 2019 if your pump still works with the fuel pump fuse removed, I'd be looking at any non-standard wiring in the car Quote Link to comment Share on other sites More sharing options...
Frank B Posted January 25, 2019 Author Report Share Posted January 25, 2019 i resolve it for now i did a wiring from the battery to a relay that is being energized by the factory fuel pump relay + better ground and more juice for the walbro 450 Quote Link to comment Share on other sites More sharing options...
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