[Answered] Why is a vacuum line attached to a fuel-pressure regulator on many port-fuel-injected engines?

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Author Question: Why is a vacuum line attached to a fuel-pressure regulator on many port-fuel-injected engines? (Read 29 times)

Anajune7

Hero Member
Posts: 574

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

Sr. Member
Posts: 341

Reply #1 on: Aug 13, 2021

To create an equal pressure drop across the injectors

Anajune7

Member
Posts: 574

Reply 2 on: Aug 13, 2021

YES! Correct, THANKS for helping me on my review

brbarasa

Member
Posts: 308

Reply 3 on: Yesterday

Gracias!

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