AGalecki Posted November 7, 2023 Report Share Posted November 7, 2023 Hello, My evo 8 is not receiving fuel from the main pump and the car will not run. It cranks but then nothing. I have switched and replaced the pumps with brand new fuel pumps and the car will run if I activate my secondary pump but the ECU seems to not be powering the main fuel pump. If I activate the secondary pump, it will turn over and run. The second I turn the secondary pump off, the car dies. The main pump is run through the stock wiring and the secondary pump is fused power off the battery with a boost activate relay switch, completely separate from the ECU. Did not have issues before the ECU swap. Maybe its just confused with a simple "high" to "low" active state? When I attempt to activate the pump through the ECU using the "Injector 5 Fuel Pump Relay Outlet" there is a click that I can hear towards the front of the car but nothing happens with the pump. Here is how the "Fuel Pump Control is configured. I have also attached the tune file. If something else needs to be looked at that I am unaware of. dardanremote.pclx Quote Link to comment Share on other sites More sharing options...
Adamw Posted November 7, 2023 Report Share Posted November 7, 2023 Try changing the fuel pump relay output to Ign 3. Quote Link to comment Share on other sites More sharing options...
AGalecki Posted November 7, 2023 Author Report Share Posted November 7, 2023 2 hours ago, Adamw said: Try changing the fuel pump relay output to Ign 3. Thank you. Read it but didn't know what it meant. Got them switched and now the AC test does what the fuel pump test did and the pump flows when tested. Quote Link to comment Share on other sites More sharing options...
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