Quantcast O2 Sensor Info - Ford Truck Club Forum




Home






Forum






Gallery






Garage






Blog






Arcade






Settings






New Posts






TOTM






Vote




Remember Me?
       Join for free!




Search






How-To's






Unanswered






FTC Toolbar






Social Sites






Register




 
Ford Truck Club Forum > GARAGE TALK > Garage Talk: Shop Class 101



Welcome to FordTruckClub.net
Welcome to FordTruckClub.net, the internet's premier Ford truck community! You are currently viewing our boards as a guest which gives you limited access to view discussions and access other forum features. By joining our free online community 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 fast, simple, and absolutely free so please, join our community today!

Forgot your password? click here.

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 

 
Thread Tools Search this Thread Display Modes
  #1  
Old October 13th, 2011, 10:56 AM
JSoko's Avatar
JSoko JSoko is offline

 

Join Date: Jun 2009
Location: Northwest Georgia
Posts: 15,019
Images: 629
Likes : 34
Liked 187 Times in 169 Posts
Thumbs up O2 Sensor Info

The Wrong Signal to the Engine Computer

Oxygen sensors let the engine computer monitor the amount of oxygen in the exhaust. Increasingly complex oxygen sensors have been used on cars since the early 1980s. Some new cars have numerous O2 sensors.

When oxygen sensors fail or degrade, the engine computer adjusts the fuel/air ratio to be too rich or too lean. The engine might hesitate, stall, surge or otherwise run badly. The catalytic converter might be damaged. Gas mileage worsens. Failed emissions tests with “high CO and/or HC” can indicate oxygen sensor problems.

Oxygen sensors thread into sockets in the exhaust so they are exposed to a very hot, harsh environment and eventually will fail no matter how well the car is maintained. But there are things you can do to avoid prematurely damaging oxygen sensors. Silicone, engine oil, and lead in the exhaust gas will coat and contaminate the oxygen sensor probe . Maintain the vehicle to protect oxygen sensors from those three.

Some engine coolants contain silicone. Fix leaking head gaskets so coolant does not seep into the engine. Since the early 1990s, there have been manufacturer technical service bulletins with titles like "Oxygen Sensor Contamination Due to Silicone”. Using tubes of silicone (RTV) sealers on or instead of engine gaskets (valve cover gaskets, oil pan gaskets, etc.) introduces silicone into the engine exhaust that can damage the oxygen sensor probe.

Keep engine oil out of the exhaust as much as possible by replacing valve stem seals, piston rings, etc. Folks have reported that engine oil contamination on the OUTSIDE of an oxygen sensor can make the oxygen sensor send the wrong signal to the engine computer. Fix external oil leaks from valve cover gaskets, PCV valve grommets, etc. Trying to weatherize an oxygen sensor by covering or coating it with anything; silicone, tubing, grease, etc. is a bad idea.

Do not use leaded gas (aviation fuel and still sold at gas stations in some countries) and avoid fuel additives or at least make sure the label on the bottle says the contents are compatible with oxygen sensors.



For Those Who Fought For It...
Freedom Has A Taste The Protected Will Never Know.














Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes


(View-All Members who have read this thread : 9
ASwaff400 , Booba5185 , JSoko , mucklife13 , Rudystruck , Russo2 , skatebowd , Steve , whitesleeper

Similar Threads
Thread Thread Starter Forum Replies Last Post
How to Test a Manifold's Absolute Pressure Map Sensor JSoko Garage Talk: Shop Class 101 6 April 2nd, 2018 02:24 PM
What Are Symptoms of a Bad Oxygen Sensor JSoko Garage Talk: Shop Class 101 0 August 26th, 2011 05:07 PM
How To Diagnose a bad Mass Airflow Sensor JSoko Garage Talk: Shop Class 101 0 August 26th, 2011 05:00 PM
Jet Mass Air Sensor Bates88 Garage Talk: Engine & Drivetrain 1 July 5th, 2010 08:45 AM
Testing a Ford 5.0L throttle position sensor BADSHOE BADSHOE Productions 0 March 14th, 2010 06:07 PM

Tags
info , sensor

Forum Jump









FordTruckClub.net is not authorized, endorsed or affiliated with the Ford Motor Company
or any of their subsidiaries. Ford® is a registered trademark of the Ford Motor Company


Powered by vBulletin® Version 3.8.6 Copyright ©2000 - 2019, Jelsoft Enterprises Ltd.