The picture below, from a previous thread, was part of a query asking: What is the Chrome disk?

Xalty responded it is Pulse Damper. I can find no reference to it in the # 3 Manual. I've googled it several ways & an image showing pulse damper just doesn't appear.

Is it a pulse damper? Might it have another name?

 

Fuel pressure regulator

 

I believe that is a pulse damper in the fuel line feeding the fuel pressure regulator to the left. That damper has no electrical or vacuum attachments so cannot control. Spring loaded diaphragm for pulse damping.

 

The pulse dampeners are mounted to the fuel rail?
I have circled it in red.


Note this is the NA version as the SC picture does not break out the dampener but does show it in the diagram.

The fuel pressure regulator is item 6 above and has a vacuum line and an electrical connection.
So I am not sure what that is? Maybe they did move the pulse dampener to that spot? As it does look like a pulse dampener?
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Thanks, Clubairth1! That helps a lot! Now, to capture & put it where I can refer to it easily.

 

That #6 wouldn't be a regulator, but a sensor. It has a diaphragm with fuel pressure on one side and vacuum on the other, and electrically notifies the PCU of what it sees as fuel pressure.

I say "sensor" instead of "regulator" because to me, a regulator is a piece of hardware that permits only a certain pressure to pass, i.e. its output line is at a lower pressure than its input. A scuba breathing apparatus is a regulator. The only way #6 could be called a regulator is that its signal is use to regulate fuel flow, but it in no way regulates pressure; it only senses it. Maybe just semantics, I don't know if Jaguar calls it a regulator or sensor. I do know i had some weirdness in my car after fixing the broken vacuum hose that attaches there, which changes how the PCU saw my fuel pressure until it eventually remapped until the airflow, fuel pressure, and O2 all made sense against each other.