Sound of fuel pressure regulator

Mario110 · Nov 14, 2020

Hi all,
I've some starting issues when cold, a lot of things are changed. For now, I just want to know if you think there is air in the fuel system. My TD5 sounds at the FPR a bit noisy...

What do you think?

Thank you in advance.
Best Mario

tilly2 · Jan 8, 2021

Sounds like air mate.... is the fuel pump noisy as well

sierrafery · Jan 8, 2021

That hissing from the FPR is normal, when you dont hear it means that the pumps runs on LP

tilly2 · Jan 9, 2021

Mine was noisy due to air in the fuel lines, and quietened down to a rushing sound once the air was released. Pump HP was fine at an indicated 4 bar.

sierrafery · Jan 9, 2021

It's more noise when air is present but a certain hissing sound must be there if the pump works well

tilly2 · Jan 9, 2021

I agree, the hissing sound is perfectly normal as fuel flows through the regulator. It was the pop pop pop gurgle that indicated air...

Sound of fuel pressure regulator

Mario110

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tilly2

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sierrafery

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tilly2

Well-Known Member

sierrafery

Well-Known Member

tilly2

Well-Known Member

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