Does the HPFP make noise?

[nikhsub1]

So, I hear what sounds to be valvetrain noise at idle - I did some research and found that the high pressure fuel pump can be noisy as it is cam driven? Is this correct? Truck runs great, no issues at all except this noise I noticed. Comes more from the passenger side wheel well than the driver side - also on top with hood open, passenger side. @FordTechOne any ideas?

 

[blwn]

Yes the HPFP can be noisy. It's run off the cam and the roller tappet is a maintenance item to check often when running a XDI pump. May be something worth checking?

Motorcraft roller tappet: AA5Z-9C587-A

XDI instructions which show how to remove the stock pump if needed:

http://www.morepowertuning.com/downloads/XDI-HPFP-Instructions_F150.pdf

 

[FordTechOne]

Yes, the HPFP is driven by a separate lobe on the cam. It’s located on the passenger side valve cover. It’s normal for HPFPs to make an audible ticking/clacking sound as they operate.

 

[nikhsub1]

Yes, the HPFP is driven by a separate lobe on the cam. It’s located on the passenger side valve cover. It’s normal for HPFPs to make an audible ticking/clacking sound as they operate.

OK that's what I was hoping, thx for the confirmation. So there is nothing to service on the pump like the tappet?

 

[2019 scott]

Yes, the HPFP is driven by a separate lobe on the cam. It’s located on the passenger side valve cover. It’s normal for HPFPs to make an audible ticking/clacking sound as they operate.

Mine is real noisy on a cold start until the engine runs a little, is that normal too? Once up to temp. mine is quiet.....

 

[FordTechOne]

Mine is real noisy on a cold start until the engine runs a little, is that normal too? Once up to temp. mine is quiet.....

Yes. When the engine is not running off of direct injection, such as on cold start, the pump is essentially dead headed at ~2000 PSI. With the higher load on the pump it will be more audible.

 

[FordTechOne]

OK that's what I was hoping, thx for the confirmation. So there is nothing to service on the pump like the tappet?

No, on a factory pump it should not need to be serviced.