Whistle during light throttle after TB/plenum install - MustangForums.com



4.6L (1996-2004 Modular) Mustang Technical discussions on 1996-2004 4.6 Liter Modular Motors (2V and 4V) within.

Reply
 
 
 
Thread Tools Search this Thread
Old 03-22-2008, 06:23 AM   #1
ryanc
Thread Starter
 
Join Date: Mar 2008
Posts: 10
Default Whistle during light throttle after TB/plenum install

I recently purchased this item combo which is a ported stock Ford throttle body and a Professional Products (trick flow) ported plenum:

http://cgi.ebay.com/ebaymotors/ws/eB...25920&rd=1

Got a damn good price as you can see.

anyway, I get a whistle when I open the throttle lightly (maybe 10-25% throttle). I don't hear any whistle at idle. Everything is good and tight and all gaskets are intact.

Any ideas?
ryanc is offline   Reply With Quote
Old 03-22-2008, 02:06 PM   #2
Jbauer
4th Gear Member
 
Join Date: Aug 2007
Posts: 1,106
Default RE: Whistle during light throttle after TB/plenum install

Damn trickflow plenums are known to do this- i found it obnoxious to the point of dying but all my friends thought it was cool. If it's not whistling at idle- when the most vaccum is present, then it's probably not a vaccum leak and standard operation. Just gotta live with it.
Jbauer is offline   Reply With Quote
Old 03-22-2008, 02:26 PM   #3
koumiss45
2nd Gear Member
 
Join Date: Mar 2006
Location:
Posts: 378
Default RE: Whistle during light throttle after TB/plenum install

My trickflow plenum does this...darn it. It drives me nuts too but everyone who isn't arouind the car alot thinks its great.
koumiss45 is offline   Reply With Quote
Old 03-22-2008, 02:30 PM   #4
Jbauer
4th Gear Member
 
Join Date: Aug 2007
Posts: 1,106
Default RE: Whistle during light throttle after TB/plenum install

My accufab i have on there now makes a diffrent sound..like a high pitched whistle- like a dog whistle almost. It got even louder when i got my cold air intake. Hopefully it gets quiter when i put a 70mm throttle body on
Jbauer is offline   Reply With Quote
Old 03-22-2008, 02:55 PM   #5
NeedStangSpeed
3rd Gear Member
 
Join Date: Oct 2006
Location: New Philadelphia, Ohio
Posts: 786
Default RE: Whistle during light throttle after TB/plenum install

I wouldn't say vacuum leak but it may be a leak either between TB and Upper plenum, or upper plenum and intake manifold, this just happened to me and I had the same sound, run your finger around those areas and check if you feel anything, if not that, say carb cleaner in those areas and see if there is a reaction to it. I just ended up putting some gasket sealer on it and it did the trick. If none of the above holds true, then I'm not sure what could be happening at that point.
NeedStangSpeed is offline   Reply With Quote
Old 03-22-2008, 05:13 PM   #6
klfutrelle
4th Gear Member
 
Join Date: Dec 2005
Location:
Posts: 1,124
Default RE: Whistle during light throttle after TB/plenum install

My accufab 75mm tb and plenum does the same thing. I can't find a leak anywhere.
klfutrelle is offline   Reply With Quote
Old 03-22-2008, 06:05 PM   #7
2k1gt
5th Gear Member
 
2k1gt's Avatar
 
Join Date: Mar 2004
Location: Athens, Georgia
Posts: 3,733
Default RE: Whistle during light throttle after TB/plenum install

Mine does it, all my friends cars do it. Don't worry about it. There is nothing wrong. I personally think it sounds awesome.
2k1gt is offline   Reply With Quote
Old 03-22-2008, 06:50 PM   #8
timeformiller44
4th Gear Member
 
Join Date: May 2006
Location: New York
Posts: 1,859
Default RE: Whistle during light throttle after TB/plenum install

if u have a CAI .. is it an open filter...chances are u hear the air being sucked in...
timeformiller44 is offline   Reply With Quote
Old 03-23-2008, 05:03 PM   #9
nebraska03gt
1st Gear Member
 
Join Date: Mar 2007
Location:
Posts: 120
Default RE: Whistle during light throttle after TB/plenum install

I installed a TB spacer and i get the whine. i like it alot though! but about the air being sucked in...my car does that when i engine brake (ive got mac CAI)
nebraska03gt is offline   Reply With Quote
Old 03-23-2008, 05:44 PM   #10
02gtfromky
 
Join Date: Mar 2008
Posts: 14
Default RE: Whistle during light throttle after TB/plenum install

got c&l plenum and accufab 75mm and was havin same problem. I also thought it was a vaccum leak. Thanks guys i was about to post and ask about it.
02gtfromky is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
2002 Mustang GT Premium 5 Speed JonnyBlazeGT Mustangs For Sale 3 11-03-2015 01:10 AM
Could I get a decent trade? kdryan 2005-2014 Mustangs 7 08-21-2015 04:01 PM
californiaspec [email protected] General Tech 0 08-18-2015 08:16 AM
Alternator problem? jjwinel78 V6 (1994-2004) Mustangs 1 08-17-2015 03:34 PM
Need Help Diagnosing Have Codes (Confused) djbigskrilla 2005-2014 Mustangs 13 08-11-2015 12:59 PM


Tags
2v, 46, 46l, 50l, body, flow, ford, highflow, mustang, plenums, products, professional, tb, throttle, trick, upper, whisle, whistle, whistles

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Forum Jump


All times are GMT -5. The time now is 06:41 PM.