H-Bridge DI Spill Valve Wiring

Chris Ludwig · Post by **Chris Ludwig** » Tue Oct 31, 2023 12:45 pm

Using an S-GDI ECU to run a Mazda 2.3T DI engine. Confused by the wiring for the spill valve to control DI fuel pressure. Software won't allow you to simply select HB1/2. Under IO Slaving you can slave Ign12 to Fuel12 and then assign Ign12(Fuel12) to the Direct Injection Pump. If I then enable HB1 Slaved To Ign8/12, do you connect HB1 to the other side of the spill valve? Meaning Fuel12 (pin 32) would connect to one side and HB1 (pin 58) to the other side of the valve? Thanks!

ismchervil · Post by **ismchervil** » Tue Mar 05, 2024 10:09 am

Hi Chris Ludwig,
Working with an S-GDI ECU on a Mazda 2.3T DI engine and facing confusion with spill valve wiring for DI fuel pressure.snake game Considering connecting HB1 to the spill valve. Any tips or experiences with this configuration?

LMS-EFI · Post by **LMS-EFI** » Thu Mar 07, 2024 3:17 pm

Ignition 12 is assigned for the spill valve. You'll wire it to pin 32 and 58. Attached a cal file Romain sent to me.

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H-Bridge DI Spill Valve Wiring

H-Bridge DI Spill Valve Wiring

Re: H-Bridge DI Spill Valve Wiring

Re: H-Bridge DI Spill Valve Wiring