Never ending exhaust rattle - Ford Focus Forum, Ford Focus ST Forum, Ford Focus RS Forum
Ford Focus Forum
HomeContact UsAbout UsGalleryDiscussion ForumsMarketplace


Go Back   Ford Focus Forum, Ford Focus ST Forum, Ford Focus RS Forum > Ford Focus SVT > SVT Performance (2002-2004)

SVT Performance (2002-2004) The place to chat about any 2.0L SVT DOHC Zetec engine performance, tuning and exhaust related upgrades.

Search This Forum | Image Search | Advanced Search    
FocusFest FocusFanatics Merchandise

Reply
 
LinkBack Thread Tools Display Modes
Old 01-31-2006, 09:58 AM   #1
Focus Addict
 
Silver03SVT's Avatar
 
Join Date: Jul 2004
Fan#: 10546
Location: Camarillo, CA, CA
What I Drive: 2009 Subaru WRX

Posts: 1,373
FF Reputation: 1 Silver03SVT Good Standing Member
Buy-Sell-Trade Rating: (0)
Never ending exhaust rattle

Well my car has been to the dealer 3 times for various rattling exhaust shields and brackets now, it seems like a 4th time is coming up quickly. Last time it was in they replaced one of the brackets with an updated one; I believe this to be the culprit yet again. Might anyone have a picture of what this thing looks like? Iím thinking of taking it to a muffler shop and just having them weld this blasted noise maker.... or remove it completely.


__________________
2009 Subaru WRX

1999 Jeep Wrangler 4.0

2007 Chevy Tahoe LTZ
Silver03SVT is offline  
    Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
Old 01-31-2006, 10:02 AM   #2
Focus Enthusiast
 
domesticdisturbance's Avatar
 
Join Date: Oct 2005
Fan#: 29006
Location: Reading ,Pa
What I Drive: 2001 zx3

Posts: 378
FF Reputation: 1 domesticdisturbance Good Standing Member
Buy-Sell-Trade Rating: (-1)
i had to replace the heat sheilding on my zx3 twice already so i feel your pain.
__________________
My faith is with the devil, because guardian angels can't keep up.
domesticdisturbance is offline  
    Reply With Quote Quick reply to this message
Old 01-31-2006, 03:04 PM   #3
The Librarian
 
WD40's Avatar
 
Join Date: Mar 2004
Fan#: 5157
Location: Helena, MT
What I Drive: '04 Sonic Blue - SVT 3Door

Posts: 13,116
FF Reputation: 138 WD40 Excellent Standing Member WD40 Excellent Standing Member
Buy-Sell-Trade Rating: (3)
Might anyone have a picture of what this thing looks like?
Check through this thread.
Part numbers and pics:
http://www.focusfanatics.com/forum/s...&postid=890639
WD40 is offline  
    Reply With Quote Quick reply to this message
Old 01-31-2006, 03:45 PM   #4
Focus Addict
 
texassvt's Avatar
 
Join Date: Jan 2005
Fan#: 18366
Location: south texas
What I Drive: 04 cd silver svt

Posts: 579
FF Reputation: 1 texassvt Good Standing Member
Buy-Sell-Trade Rating: (5)
Unhappy heat sheild

well not sure, going down the express way i hear a noise, look out the rear view mirror and see my lower heat shield go bye bye. damn a lound thud. now the upper shield is make a rattling noise. ? is do they need to be there? is it going to damage/over heat anything around the cat? i would just rather remove the damn thing than put up with it. its really anoying.
__________________
you want to play you got to pay.

mods: modified exhaust
wayne's tune Xcal1 unit
MSD coil & wires copper plugs, RT cat, FR STS
VF rear trans mount
redline mats, viper alarm, tyc tails
kyowa 17" gunmetal rims with BFG KDW's hoen hid match foglight bulbs
SVT SQUAD #117
texassvt is offline  
    Reply With Quote Quick reply to this message
Old 02-01-2006, 02:08 AM   #5
Focus Enthusiast
 
Gr1mr3ap3r's Avatar
 
Join Date: Jan 2006
Fan#: 31726
Location: San Diego, CA
What I Drive: 2003 Screaming Yellow SVTF

Posts: 57
FF Reputation: 1 Gr1mr3ap3r Good Standing Member
Buy-Sell-Trade Rating: (0)
I was told that they are there to keep the cats temp up so that it works more effieciently... don't know for sure though. I was also told that it would be a good idea to have it on there for emmisions testing.
Gr1mr3ap3r is offline  
    Reply With Quote Quick reply to this message
Old 02-01-2006, 05:39 AM   #6
Focus Fanatic
 
zslaton's Avatar
 
Join Date: Aug 2004
Fan#: 11347
Location: Dearborn, MI
What I Drive: 2002 Yellow Power Premium ZX5

Posts: 1,641
FF Reputation: 1 zslaton Good Standing Member
Buy-Sell-Trade Rating: (1)
The shield is there to protect other components from the heat of the cat, not to help suck heat away from the cat. And Gr1mr3ap3r is right... cats do work more effeciently when hot. Thats why automakers try to put them as close to the exhaust ports as possible. If you check the EPA website, you will see that the non-SVT Focus, which has its cat right near the exhaust ports, is certified to a more stringent emissions standard than the SVT version, which makes more power and torque with the same displacement engine while also moving the cat underbody. Hotter isn't always better though... all of the OEMs have controls algorithms that go rich during WOT conditions to help send fuel through to the cat and keep it cool. Over heating a cat will melt the substrate material.

You don't have to worry about any of this if you lose one of your shields... cat temp will be unaffected. However, you might have to worry about a rattling sound or setting grass on fire if you take the car offroading.
__________________
... still plays with cars ...
zslaton is offline  
    Reply With Quote Quick reply to this message
Old 02-01-2006, 09:41 AM   #7
Focus Addict
 
Silver03SVT's Avatar
 
Join Date: Jul 2004
Fan#: 10546
Location: Camarillo, CA, CA
What I Drive: 2009 Subaru WRX

Posts: 1,373
FF Reputation: 1 Silver03SVT Good Standing Member
Buy-Sell-Trade Rating: (0)
My cat shields got the better of me and I ripped both the upper and lower ones off. I believe this other rattle is from a mounting bracket which was supposidly replaced a month or 2 ago at the dealer, but the rattle is made its way back. I have not seen the actulal culprit, but I believe the link WD40 provided (that guy is knows all the links!) shows what needs to be fixed.
__________________
2009 Subaru WRX

1999 Jeep Wrangler 4.0

2007 Chevy Tahoe LTZ
Silver03SVT is offline  
    Reply With Quote Quick reply to this message
Old 02-01-2006, 09:55 AM   #8
Focus Fanatic
 
Join Date: Apr 2005
Fan#: 21700
Location: Iowa
What I Drive: 2005 Infrared ZXW

Posts: 3,737
FF Reputation: 109 penguin Excellent Standing Member penguin Excellent Standing Member
Buy-Sell-Trade Rating: (0)
"all of the OEMs have controls algorithms that go rich during WOT conditions to help send fuel through to the cat and keep it cool."

Since one of the main purposes of the cat is to burn unburned fuel before it goes out the tail pipe, wouldn't sending fuel to the Cat make it run hotter? e.g., running rich, such as with a misfire, can make a cat "melt," hence the increased concern with correcting misfires quickly on newer cars.

My understanding was that the purpose of "going rich" under WOT was to ensure the cat occassionally got hot enough to prevent accumulation of deposits that would reduce the catalyst's effectiveness, e.g., since most drivers only use WOT occassionally (most drivers), going rich under WOT was a practical way to ensure the cat got "burned clean" on occassion, and reached a temperature that you would not want it to maintain for any sustained period of time.

I believe I read that in a Ford shop manual a few years ago.
penguin is offline  
    Reply With Quote Quick reply to this message
Old 02-01-2006, 10:45 AM   #9
Focus Fanatic
 
zslaton's Avatar
 
Join Date: Aug 2004
Fan#: 11347
Location: Dearborn, MI
What I Drive: 2002 Yellow Power Premium ZX5

Posts: 1,641
FF Reputation: 1 zslaton Good Standing Member
Buy-Sell-Trade Rating: (1)
There may be multiple reasons for going rich at WOT, several of which you listed. I definately know that one of the reasons for running rich is protecting the cats. Think of it like sweat... you sweat because evaporation makes you cooler. Same with the cat. The EPA actually regulates how long the automanufacturers can go rich during WOT, because the emissions get worse since not all of the hydrocarbons get burnt up on the cat. They just get vaporized. Thus, the cat stays cool.
__________________
... still plays with cars ...
zslaton is offline  
    Reply With Quote Quick reply to this message
Reply

Bookmarks & Social Networks

Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the Ford Focus Forum, Ford Focus ST Forum, Ford Focus RS Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.
User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:

Log-in

Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.



Thread Tools
Display Modes

Posting Rules
You may post new threads
You may 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 On
Pingbacks are On
Refbacks are On



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


Copyright 2002-2015 FocusFanatics.com. All Rights Reserved : Privacy Policy : Advertise Information

Focus Fanatics Ford Focus Forum offers many fun ways for you to engage with other Ford Focus Owners from across the world. Whether it be about the aftermarket performance modifications, technical how-to's, European tuned suspension or awesome fuel economy similar to the Mazda CX-3, Audi S3, Mazda MX-5 Miata and Acura TLX. You can find all Ford Focus, Focus ST and Focus RS related information here. Join our Ford Focus discussion forums and chat with local Focus enthusiasts in your area. If you own other makes have a look at Challenger Hellcat Forum, Charger Hellcat Forum, Cadillac ATS-V Forum, Cadillac ATS Forum, Cadillac CTS-V Forum, Lexus RC-F Forum, Lexus GS-F Forum, Mercedes GLA Forum, Mercedes GLE Forum, Civic Type-R Forum and Volvo XC90 Forum.





Search Engine Optimization by vBSEO 3.6.1