Sound at 1300 to 1400 rpm

[aggieLR]

I've got an '04. It's all stock with 2900 miles. At around 1300-1400 rpm I'm getting this sound that sounds (as best as I can describe) as a spray. It sounds like when you drive through a puddle of water at 30+ mph. It is very distinct at only this RPM though, not anywhere else. I didn't notice it before last night, but I do notice it now. Anyone got any ideas as to what it could be?

 

[RankRam]

Need more info, but it wouldn't hurt to check intercooler clamps to see if their loose and leaking at higher boost.

 

[aggieLR]

What other info do ya need? It happens at any speed and sittin still. I do have boost/pyro guages installed, but this sound isn't with much if any boost. I did check all the fittings and bolt for the boost guage and its all tight.

 

[aggieLR]

It seems to only do it when the engine is hot. This morning when I left for work, it wasn't doing it. Would the injection or transfer pump make this kind of noise at a certain RPM?

 

[Buzzer]

Sounds like your fan clutch is engaging at that rpm. Could be that is where the sound is coming from. The 04. 5's do not have an electric fan.