Whistle from engine after shut off after tvs

[JDV]

When shut down, car has a whistle. Heard it on other cars (brands, etc) but never on this one till after tvs blower was installed. Normal?

 

[SID297]

How long does it last? It might be the bypass valve actuating.

 

[kevinp]

I dont hear anything at all after I shut it off, only thing I can think of that would hold vacuum and leak is the power brake booster itself or the check valve.

 

[SicShelby09]

Boost bypass. Nothing to worry about. All termys and gt500s do it too.

 

[Turbosixx]

I dont hear anything at all after I shut it off, only thing I can think of that would hold vacuum and leak is the power brake booster itself or the check valve.

Me neither.

 

[JDV]

Only about 5-7 seconds. I seem to recall my first termi making a similar sound.

I'd be concerned it was an intake leak or something, but if that was bad enough it would throw a code so no worries.

 

[Parts-is-Parts]

Are you sure your pcv lines are setup correctly?
This would be the most likely culprit.

 

[JDV]

Pretty darn sure the pcv lines all plugged up tight and all. I'll go by and check it out later today. Also gonna retorque the intake bolts just to make sure

 

[SicShelby09]

Pretty darn sure the pcv lines all plugged up tight and all. I'll go by and check it out later today. Also gonna retorque the intake bolts just to make sure

Its normal. As I already stated. Ask this question is the GT500 section and those guys with the TVS blowers will tell you the same thing. Its the boost bypass opening up and letting out the pressure from the system on shut off. I have owned both the terminator and the GT500 and they all do this too because the blowers all have the boost bypass built in. Its normal.

 

[JDV]

Suspect your right. Thanks sicshelby.

 

[kevinp]

Its normal. As I already stated. Ask this question is the GT500 section and those guys with the TVS blowers will tell you the same thing. Its the boost bypass opening up and letting out the pressure from the system on shut off. I have owned both the terminator and the GT500 and they all do this too because the blowers all have the boost bypass built in. Its normal.

Mine doesnt make any noise at all after shutoff, neither did my GT500 (stock blower), nothing that I noticed anyhow. Its more than possible the bypass is making the noise, honestly I have never really listened for anything under the hood at shutoff

 

[SicShelby09]

Mine doesnt make any noise at all after shutoff, neither did my GT500 (stock blower), nothing that I noticed anyhow. Its more than possible the bypass is making the noise, honestly I have never really listened for anything under the hood at shutoff

How much of a pffffff or whistle you hear is baised on the driving habbits before you turned it off. More pressure in the system means more noise. And also, I always heard it because I always parked my car in my garage. But, when it was turned off outside I couldn't hear it. The garage would echo the sounds the car made on shutoff, and you could hear them easily. Outside you will not hear it.

 

[kevinp]

How much of a pffffff or whistle you hear is baised on the driving habbits before you turned it off. More pressure in the system means more noise. And also, I always heard it because I always parked my car in my garage. But, when it was turned off outside I couldn't hear it. The garage would echo the sounds the car made on shutoff, and you could hear them easily. Outside you will not hear it.

I park in the garage and I'm pretty good at hearing out of the ordinary noises, I'll have one of my kids turn it off while listening under the hood just to see.