Exhaust smell - Focus Fanatics
Ford Focus Forum
HomeContact UsAbout UsGalleryDiscussion ForumsMarketplace



Go Back   Focus Fanatics > Ford Focus Tech Discussions > General Technical Chat

General Technical Chat This section is for technical discussions relating to general maintenance, electrical issues, engine trouble, and recalls.

Search This Forum | Image Search | Advanced Search    
FocusFest Ford Focus Tire & Wheels FocusFanatics Merchandise

Reply
 
Thread Tools Display Modes
Old 03-09-2008, 10:33 PM   #1
brandnew161
Focus Addict
 
brandnew161's Avatar
 
Join Date: Apr 2007
Fan#: 46064
Location: ny, Afghanistan
What I Drive: 95' Eagle Talon TSi AWD

Posts: 897
FF Reputation: 4 brandnew161 Good Standing Member
Buy-Sell-Trade Rating: (2)
Exhaust smell

I've been having some recent trouble with bad gas mileage. I've done ALL regular maintenance to try and solve it. I'm not getting that bad mileage but 55miles on 3 gallons isnt too hot either. Since i've done all the little stuff i'm now looking at my major mods...catback and cams/gears. I've been playing around with the timing every few weeks to try and notice a difference in mileage but nothin. Messin mith the timing as fixed a high idle though. I dont know if my car is running rich but i can smell unburnt fuel in the exhaust. Its smells like you've been running a chainsaw for an hour and u can still smell ure clothes for the rest of the day. So its pretty noticeable. But maybe the car isnt running rich and its just the catback. I have a race header and there really is no cat on the car...just a test pipe really. When installing a catback do you smell gas more noticeably than with the stock pipe?


__________________
ZC#172
brandnew161 is offline  
    Reply With Quote
Old 03-10-2008, 08:50 AM   #2
nov173
Focus Fanatic
 
nov173's Avatar
 
Join Date: Nov 2005
Fan#: 29840
Location: Pittsburgh, Pa, United States
What I Drive: 2014 Focus ST

Posts: 3,263
FF Reputation: 79 nov173 Excellent Standing Member
Buy-Sell-Trade Rating: (4)
could be a bad 02 sensor... you getting any codes? could be your primary sensor
__________________
SVT header kit, 2.25 MBRP cat-back & flex, r/t high flow cat. aem cai, frpp kit

For Sale: Rear bumper(stock). SVT side skirts FS as well. Buy em!!!!
nov173 is offline  
    Reply With Quote
Old 03-10-2008, 10:27 AM   #3
c03morrison
Focus Addict
 
c03morrison's Avatar
 
Join Date: May 2007
Fan#: 47010
Location: massachusetts, United States
What I Drive: 04 tundra zx3

Posts: 740
FF Reputation: 6 c03morrison Good Standing Member
Buy-Sell-Trade Rating: (4)
i would also like to know because i am getting that same smell
__________________
04 light tundra green metalic zx3, cia w/ K&N filter, fc 4-2-1, 2.5 bolra trubendz, eibach sportline kit, tinted tails and side blinkers, euro headlights, sct chip, oem cf hood, euro replica bumper
c03morrison is offline  
    Reply With Quote
Old 03-10-2008, 03:39 PM   #4
KS1
Focus Addict
 
KS1's Avatar
 
Join Date: Apr 2007
Fan#: 46191
Location: Catlin, IL
What I Drive: '04 Toreador Red Manual ZX3

Posts: 399
FF Reputation: 4 KS1 Good Standing Member
Buy-Sell-Trade Rating: (6)
it's just because you eliminated your cat

the cat normally burns up most of the unused fuel and other undesireables coming from the engine

I have a race header, and I get the same smell

don't worry about it, but plant a tree or two to offset the damage to the environment
__________________
Zetec Crew #159

"The road of excess leads to the palace of wisdom."
KS1 is offline  
    Reply With Quote
Old 03-10-2008, 03:42 PM   #5
KS1
Focus Addict
 
KS1's Avatar
 
Join Date: Apr 2007
Fan#: 46191
Location: Catlin, IL
What I Drive: '04 Toreador Red Manual ZX3

Posts: 399
FF Reputation: 4 KS1 Good Standing Member
Buy-Sell-Trade Rating: (6)
and you probably smell it more now than with the stock exhaust because it flows better and doesn't have to snake through the muffler and lunchbox
__________________
Zetec Crew #159

"The road of excess leads to the palace of wisdom."
KS1 is offline  
    Reply With Quote
Old 03-10-2008, 04:05 PM   #6
FuriousFocus
Focus Addict
 
FuriousFocus's Avatar
 
Join Date: Aug 2005
Fan#: 26361
Location: Kent, OH
What I Drive: 02 Zetec 5speed

Posts: 774
FF Reputation: 5 FuriousFocus Good Standing Member
Buy-Sell-Trade Rating: (0)
I have a small catco cat on the car with my setup and you can smell the fumes alot more now. No worries. With the bad gas mileage, if you just recently installed everything and your bank1 sensor is pretty new (like 50 -75,000miles) then you are proably fine. But I would replace it with an NTK sensor (not Bosch) I don't like there sensors, and you may notice an improvement.

I know I tore it up a little when I first put the header on, my gas mileage was down for awhile.
__________________
My ride is 10 years old this year, I might bake the little hatch a cake!
FuriousFocus is offline  
    Reply With Quote
Old 03-10-2008, 04:11 PM   #7
KS1
Focus Addict
 
KS1's Avatar
 
Join Date: Apr 2007
Fan#: 46191
Location: Catlin, IL
What I Drive: '04 Toreador Red Manual ZX3

Posts: 399
FF Reputation: 4 KS1 Good Standing Member
Buy-Sell-Trade Rating: (6)
yeah, as far as the mileage, it takes the ECU a little while to readjust to all the new goodies you just installed
__________________
Zetec Crew #159

"The road of excess leads to the palace of wisdom."
KS1 is offline  
    Reply With Quote
Old 03-10-2008, 04:18 PM   #8
brandnew161
Focus Addict
 
brandnew161's Avatar
 
Join Date: Apr 2007
Fan#: 46064
Location: ny, Afghanistan
What I Drive: 95' Eagle Talon TSi AWD

Posts: 897
FF Reputation: 4 brandnew161 Good Standing Member
Buy-Sell-Trade Rating: (2)
the cams and catback were installed in late july... so theyve been on for a while.
I have no codes, but i did hook up an O2 cheater due to the race header.
I have 53k on my zetec and i'm going to get new o2 sensors soon. I've heard good things about NTK

Another question...when reseting the ecu so that it can relearn the air/fuel map, why do you have to let the car idle afterwards for 5 minutes? If it takes 150 miles for the computer to fully establish the fuel map then isnt the whole idle process a waste?
__________________
ZC#172
brandnew161 is offline  
    Reply With Quote
Old 03-10-2008, 04:33 PM   #9
KS1
Focus Addict
 
KS1's Avatar
 
Join Date: Apr 2007
Fan#: 46191
Location: Catlin, IL
What I Drive: '04 Toreador Red Manual ZX3

Posts: 399
FF Reputation: 4 KS1 Good Standing Member
Buy-Sell-Trade Rating: (6)
oh, ok, I thought you had just put them on

this sounds dumb, but check your tire pressure, the focus is kinda picky about tire pressure, it can screw with you mpg
__________________
Zetec Crew #159

"The road of excess leads to the palace of wisdom."
KS1 is offline  
    Reply With Quote
Old 03-10-2008, 05:10 PM   #10
brandnew161
Focus Addict
 
brandnew161's Avatar
 
Join Date: Apr 2007
Fan#: 46064
Location: ny, Afghanistan
What I Drive: 95' Eagle Talon TSi AWD

Posts: 897
FF Reputation: 4 brandnew161 Good Standing Member
Buy-Sell-Trade Rating: (2)
tire pressure is good, 43 psi in all 4.

does cam timing really have an effect on gas mileage? I only have stg 1 compcams so i'm not running any aggressive grinds. I havent been to the dyno yet to have my gears adjusted, i want to wait until the summer when i can install the turbo. Right now my gears are set zero and zero and i know every motor is different...but would any change from zero either way (no more than +or-2 degrees) really affect my gas mileage this much?
__________________
ZC#172
brandnew161 is offline  
    Reply With Quote
Reply

Bookmarks & Social Networks

Thread Tools
Display Modes

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

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Every trouble code defined 03OrangeSVT General Forced Induction 9 05-25-2011 12:53 PM
Update on Headers... 03_SPI_sedan SPI Performance (2000-2004) 103 02-25-2011 12:28 PM
EXHAUST NEEDED FOR SVT FOCUS!!! will part with stock exhaust system SVTmademe Archive 0 09-02-2005 01:07 AM
CEL and faint sulphur smell in exhaust SkaAddict General Technical Chat 18 06-20-2005 12:25 AM
supercharger vs turbocharger? FordFocusFreak General Forced Induction 6 04-07-2004 12:05 AM


All times are GMT -5. The time now is 05:56 AM.


Copyright 2002-2014 FocusFanatics.com. All Rights Reserved : Terms of Use : Privacy Policy : Advertise Information : Site Map

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 Acura TLX or Fiesta ST. You can find all Ford Focus and Focus ST related information here. Join our Ford Focus discussion forums and chat with local Focus enthusiasts in your area.