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4D fuel trim using fuel pressure

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I've fitted a fuel pressure sensor and have noticed that the fuel pressure fluctuates over time slightly. Is there a formula that I can use so if say the fuel pressure reduces by 1psi I should add X% if fuel?

I expect there may be an option with some ECUs - for those with the knowledge, exactly what make and model are you using?

I've got a Link G4X plug and play

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