Problem after installing trickflow upper plenum

J

Jbauer

New Member

Jan 20, 2008

506

0

0

Jan 20, 2008

#1

• Jan 20, 2008

• #1

I installed the trickflow upper plenum, now i get a whistle. It only happens at about, i'd say 1/4 throttle. Its bolted to the stock throttle body. I can't figure out why its doing this; when i tightend down the bolts that secure the the upper plenum to the lower plenum, i heard a crack, so i thought i may of damaged the lower plenum, but the car drives and idles perfect, theres no whistle at idle. I have a feeling that this isn't normal operating sound, although, it does sound pretty good.
Can anyone offer any help or advice?
thanks

 

SVT32VDOHC

waiting for the next hack atta

Founding Member

Nov 22, 2001

3,501

28

119

Motor City

Jan 20, 2008

#2

• Jan 20, 2008

• #2

If you heard a crack I assume you cracked the lower intake. There are steel thread inserts into the plastic. Even a hairline crack will cause a whistle.

 

J

Jbauer

New Member

Jan 20, 2008

506

0

0

Jan 20, 2008

#3

• Jan 20, 2008

• #3

but wouldn't it whistle at idle if the intake manifold was cracked?

 

SVT32VDOHC

waiting for the next hack atta

Founding Member

Nov 22, 2001

3,501

28

119

Motor City

Jan 20, 2008

#4

• Jan 20, 2008

• #4

You would think so. I have heard others having whistling problems after this install. Try a search because I think it has been covered once or twice recently. Also, maybe it just doens't happen until you get more air flow.

 

S

stal94gt

New Member

Dec 18, 2007

14

0

0

florida

Jan 20, 2008

#5

• Jan 20, 2008

• #5

i had the same issue when i put that plenum on. and every one else i know has that whisle to. i think it is cause it is such thin aluminum compaired to stock you hear it.

 

J

Jbauer

New Member

Jan 20, 2008

506

0

0

Jan 20, 2008

#6

• Jan 20, 2008

• #6

SVT, i dont think its because it has more airflow that it sounds off at 1/4 throttle, when i floor it, it goes away. only at part throttle (where i usually drive..) can i hear it.
Stal, did you change plenum to another brand? if so, did it go away?

 

fobra559

At least it's more erect and not floppy anymore.

Nov 1, 2007

721

0

0

Lindsay, CA

Jan 20, 2008

#7

• Jan 20, 2008

• #7

I have a C&L plenum with a Accufab tb and I hear whistle at low speeds also but then goes away when I'm at higher speeds. I hear a lot of others saying that their C&L whistle too so I wouldn't worry about it much.

 

COramprat

...I can take it. I think.

20+ Year Stangneter

Mar 2, 2003

8,474

1,463

223

Sea of Tranquility

Jan 20, 2008

#8

• Jan 20, 2008

• #8

Never had an issue with the Trick Flow.

Did you replace the gasket?

 

J

Jbauer

New Member

Jan 20, 2008

506

0

0

Jan 20, 2008

#9

• Jan 20, 2008

• #9

which gasket? the ISV and EGR gaskets were re used, and so was the throttle body gasket.. i'll try replacing the throttle body gasket..and then i'm going back to the stock plenum to see if it keeps making the sound..if it doesn't, i'm throwing the trickflow out and putting in a BBK or something.

 

V

VIRstang

Member

Jan 3, 2007

67

0

7

Cary, North Carolina

Jan 20, 2008

#10

• Jan 20, 2008

• #10

I installed the TrickFlow plenum with stock throttle body and I have no whistle. I seem to have a much better throttle reponse. I love the install!!

 

J

Jbauer

New Member

Jan 20, 2008

506

0

0

Jan 20, 2008

#11

• Jan 20, 2008

• #11

I just put my stock piece in..no whistle.
the trickflow piece has jagged up edges and stuff, nearly cut me, real real poor cut. I will never buy another trickflow product again. I'm returning this POS, and buying an Accufab product.