[SOLVED] What is this whistle noise under acceleration? (03 Tacoma, 3.4, SC)

[digitalferg]

My 1st Gen Tacoma has developed a bit of a whistle... Any thoughts on where this might be coming from? Something to do with the supercharger perhaps?-- but thoughts on what/where/how? I've had the supercharger on for about 4K miles or so now and it just started this whistle the past week. Only happens under ~mid acceleration and only while driving.

2003 3.4, TRD supercharger (black 2nd gen version), 99k miles on motor/truck, ~12k miles on SC now, auto transmission.

https://www.youtube.com/watch?v=3EFmVcclSkE

https://www.youtube.com/watch?v=C25IQfiMeC4

 

[jkeith.w]

pinhole in muffler?

 

[Tyler James Inc]

What is this whistle noise under acceleration? (03 Tacoma, 3.4, SC)

Man, I hate noises like that. Well, not the SC noise so much [emoji16]
It's always hart to tell from a video, but could it be a loose bracket somewhere that's rattling? Like the throttle cable bracket or something?
Does it only happen under boost? Did you install a boost gauge?
I'm assuming you checked- and double checked- all the intake boot clamps etc.

 

[mtbtim]

Vacuum leak. Check for disconnected or broken vacuum lines.

 

[digitalferg]

I think I found the problem....

 

[ChildrenOfBodom]

Oh yeah, that'll do it.

 

[digitalferg]

Yep, that was it. Replaced it with some spare vacuum hose I had around and the whistle is all gone. Yay!

BTW, I cross-posted this issue over on TacomaWorld forums and a guy posted this oldie-but-goodie youtube video that I just had to post up here for you guys:

Whistle Tips with Bub Rub


.