Ford Enthusiast Unofficial Resource

Go Back   Ford Forum - Enthusiast Forums for Ford Owners > Ford Trucks, Ford Vans & Ford SUV's > Ford F-150
Sign in using an external account
Register Forgot Password?
Search


Welcome to Ford Forum!
Welcome to Ford Forum,

You are currently viewing our forum as a guest, which gives you limited access to view most discussions and access our other features. By joining our community, at no cost, you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is free, fast and simple, so please join our community today!


Reply
 
 
 
 
LinkBack Thread Tools Search this Thread
  #1  
Old 10-15-2006, 08:52 PM
 
Join Date: Oct 2005
Location:
Posts: 34
Default Oxygen sensor and cat removal

I have a '92 F150 with a 302 and I would like to know if I can take the cat off. I think the sensor is before the cat right where the Y pipes come together, am I right? Also what does the air tube do and what would I do with it if I were to take the cat off?

thanks
mexiburger
Reply With Quote
  #2  
Old 10-16-2006, 11:34 AM
Bullitt94's Avatar
Senior Member
1970 Ford Bronco
 
Join Date: Aug 2005
Location: De Pere, WI
Posts: 1,067
Default RE: Oxygen sensor and cat removal

Sensor is before the cat. The EGR return comes off of the cat, but if it is disconnected it won't make much of a difference. The fitting on mine rusted off and it was hanging there for a year, but the engine functioned fine. If you do remove the cat, you could just remove the vacuum line to the EGR and the engine will run without the EGR valve.
__________________
1994 Ford Mustang GT
1990 Ford Bronco II
2001 Lincoln LS V8
1970 Ford Bronco
2006 Harley-Davidson Sportster Custom

If you don't already own a Ford (or Ford owned product), get one.
Reply With Quote
  #3  
Old 10-16-2006, 11:54 PM
 
Join Date: Oct 2005
Location:
Posts: 34
Default RE: Oxygen sensor and cat removal

Thanks for the help

so to clarify if the sensor is before the cat it's ok to take it off right? Now with the EGR valve is this only a emissions control part or will it affect other things. I have read that a bad EGR valve will affect things like gas milage and will cause detonation, but is this only because of a bad valve and if it's not hooked up this won't happen? Also would it be worth it (or even work) to run a new air tube to the exhaust pipe??

Thanks again
mexiburger
Reply With Quote
  #4  
Old 10-20-2006, 11:46 AM
Bullitt94's Avatar
Senior Member
1970 Ford Bronco
 
Join Date: Aug 2005
Location: De Pere, WI
Posts: 1,067
Default RE: Oxygen sensor and cat removal

I heard it may effect gas milage. When the tube for mine was broke off compared to now having it connected again I haven't noticed much of a difference. 1 mpg when I am only getting about 14 mpg may be the difference.

I haven't heard about hooking it up to a straight pipe. I don't think I would do that. The catalytic convertor is designed to redirect unburned gas and air; a straight pipe probably won't do that very well.
__________________
1994 Ford Mustang GT
1990 Ford Bronco II
2001 Lincoln LS V8
1970 Ford Bronco
2006 Harley-Davidson Sportster Custom

If you don't already own a Ford (or Ford owned product), get one.
Reply With Quote
  #5  
Old 10-22-2006, 12:14 AM
Hayapower's Avatar
Super Moderator
2005 Ford F-250
My Garage
 
Join Date: Jul 2006
Posts: 4,141
Default RE: Oxygen sensor and cat removal

The tube running forward of the cat isn't EGR.. It's thermactor/secondary fresh air injected from the smog air pump for converter/catalyst secondary burn/conversion.. Disabling/restricting an EGR flow (drastically), can/will result in a DTC.. The tube is needed for a fresh air suppy to the converter.. Whats the reason you want to pull the cat?
__________________
05 F250 C/C FX4 6.0
1969 Firebird Trans Am
2003 Hayabusa GSXR1300
Reply With Quote
  #6  
Old 10-22-2006, 12:57 PM
 
Join Date: Oct 2006
Location:
Posts: 3
Default RE: Oxygen sensor and cat removal

Hayapower is correct. The tube from the converter is for the smog pump (air injection) for the catalytic converter. The EGR tube comes off the passenger side exhaust manifold. Disconnecting the tube from the converter will not hurt if you remove the conveter and close off the tube end or leave it open. If you leave it open then at times you will hear a pumping sound from the tube caused by the smog pump when it reaches proper temperature. The EGR tube if disconnected will turn on the check engine light and set a DTC. I have to ask the same question. Why are you wanting to get rid off the catalytic converter?
Reply With Quote
  #7  
Old 10-23-2006, 10:38 AM
Bullitt94's Avatar
Senior Member
1970 Ford Bronco
 
Join Date: Aug 2005
Location: De Pere, WI
Posts: 1,067
Default RE: Oxygen sensor and cat removal

My bad. [sm=icon_beat.gif]

Thanks for the clarification.
__________________
1994 Ford Mustang GT
1990 Ford Bronco II
2001 Lincoln LS V8
1970 Ford Bronco
2006 Harley-Davidson Sportster Custom

If you don't already own a Ford (or Ford owned product), get one.
Reply With Quote
Old 10-23-2006, 10:38 AM
 
 
 
Reply

Tags
1994, 92, 94, disconnect, egr, f150, f350, gt, mustang, o2, pump, removal, sensor, smog, valve

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 On
Pingbacks are On
Refbacks are On


Advertising
Our Sponsors
Vendor Directory
New Sponsors
All times are GMT -5. The time now is 04:49 AM.

© Internet Brands, Inc.


This forum is owned and operated by Internet Brands, Inc., a Delaware corporation. It is not authorized or endorsed by the Ford Motor Company and is not affiliated with the Ford Motor Company or its related companies in any way. Ford® is a registered trademark of the Ford Motor Company.

SEO by vBSEO ©2010, Crawlability, Inc.