Dfeeds
Well-Known Member
- Joined
- Sep 30, 2018
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- Illinois, US
- First Name
- Dan
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- 1997 Mustang (5.0 HO swap), 2019 Mustang GT PP1
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- #1
This has been doing this from day one of the new engine and I've just ignored it but now curiouscur is getting to me.
Basically, at idle and at any temp, the HP/GDI pump makes a rapid ticking sound that doesn't change with rpm. I pinpointed it with a stethoscope. It's not constant, either, it's like it switches on for about 10 seconds, switches off, then switches back on, etc. My guess is that it's regulating fuel pressure, but I'm just curious why the old engine didn't do this at all. Nothing looks loose, and the sound deadening looks to still be in place around the pump. My theory would simply be that there's an extra layer of sound deadening that was forgotten, but I have no way to know for sure without a source of reference.
Anyone else experience this? I'm not particularly worried, but I would like to have a why. I can post a video a little later.
Basically, at idle and at any temp, the HP/GDI pump makes a rapid ticking sound that doesn't change with rpm. I pinpointed it with a stethoscope. It's not constant, either, it's like it switches on for about 10 seconds, switches off, then switches back on, etc. My guess is that it's regulating fuel pressure, but I'm just curious why the old engine didn't do this at all. Nothing looks loose, and the sound deadening looks to still be in place around the pump. My theory would simply be that there's an extra layer of sound deadening that was forgotten, but I have no way to know for sure without a source of reference.
Anyone else experience this? I'm not particularly worried, but I would like to have a why. I can post a video a little later.
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