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Discussion Starter #1 (Edited)
Another day another gencoupe post with a possible issue with my car...

The noise sounds identical to this:
Only happens at idle, and doesn't happen consistently. Car still drives fine and pulls fine.

I live in a very hot climate 110+ during the summer, around 100 now.
Mobil 1 5w30, changed 2kish miles ago.
SRI
CNT catback
68k miles
That's it.


Should I be worried?
 

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No sir, GDI,..that is your HPFP. (High pressure fuel pump).

If you replace your tank LPFP, everything gets even louder. If you replace your fuel lines with SS, it gets even louder.
 

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When it starts making the noise, turn off the AC and/or windshield defrost.
Listen if the noise is still there.
If no noise then noise if possibly coming from the AC pump.

remove the belt, and let it run for like 15~30 sec.
Listen and hear if the noise is still there.
If no noise then possibly coming from the water pump or power steering pump.
 

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Discussion Starter #8
Im having this exact noise. Did you ever find out what it was?

help!!! ;p
No sir. It's been over two years since this post and it still makes the exact same noise. I just swapped to 5w40 and the noise is still there but it's a little faster.
 

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No sir. It's been over two years since this post and it still makes the exact same noise. I just swapped to 5w40 and the noise is still there but it's a little faster.
well .. if it survived so long.. but still it would be worth checking. Maybe jsut get the valve cover of and measure the clearances.
Easy job and something may pop into your view while at it
 

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Mine makes the same noise, has since I got it back in 2013. Just hit 109k miles on it. Doesn't seem to be an issue.
 
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