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Author Question: Why is a vacuum line attached to a fuel-pressure regulator on many port-fuel-injected engines? (Read 30 times)

Anajune7

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on: Aug 13, 2021
Why is a vacuum line attached to a fuel-pressure regulator on many port-fuel-injected engines?
◦ To draw fuel back into the intake manifold through the vacuum hose
◦ To create an equal pressure drop across the injectors
◦ To raise the fuel pressure at idle
◦ To lower the fuel pressure under heavy engine load conditions to help improve fuel economy


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Marked as best answer by Anajune7 on Aug 13, 2021

duy1981999

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Reply #1 on: Aug 13, 2021
To create an equal pressure drop across the injectors


Anajune7

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Reply 2 on: Aug 13, 2021
YES! Correct, THANKS for helping me on my review

T4T

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Reply 3 on: Yesterday
Thanks for the timely response, appreciate it

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