Emissions Archives - Page 3 of 15 - TechShop Magazine
Determining When An Oxygen Sensor Needs Replaced

When diagnosing any oxygen sensor, remember that outside air entering the exhaust system from an exhaust leak will obviously reduce an oxygen sensor’s indicated voltage output. It’s also important to know that oxygen sensors can become rich or lean biased due to problems like sensor contamination and faulty sensor grounds. Remember that, regardless of how well it tests, a biased sensor will not produce a stoichiometric air/fuel ratio. So, if the sensor is questionable, it should be replaced.

Delphi Launches Latest Emissions Standards Guides, Now Also Available As An Interactive App

The popular Delphi Automotive Worldwide Emissions Standards booklets provide easy-to-read summaries of emissions regulations from around the world. An updated 2013-2014 edition for passenger car and motorcycle emissions standards is now available. New this year, this version, together with the heavy-duty and off-highway commercial vehicles edition, are available as an interactive app for iPad users.

Diagnosing A 2011 Chrysler Town & Country With Trouble Code P0152

Verify the wiring to the O2 sensors is normal. These sensors will normally switch between 2.5 volts and 3.5 volts when they are working correctly. The sensor ground will have 2.5 volts on it and this is normal for this vehicle.

Diagnosing And Replacing Oxygen Sensors

An oxygen sensor test can be used to assist technicians in verifying the oxygen sensor operation, but it should not be the only test used to determine if a sensor should be replaced. Most scan tools have an oxygen sensor tests function (also known as Mode $05), which allows a technician to view the data readings for the oxygen sensor(s).

Pulling Codes: The Importance Of Communication – No Code Analysis

For this month’s Pulling Codes case, we will attempt to provide a plan of attack for communication issues on General Motors products with the Class 2 Protocol. Our diagnostic journey begins with a 2004 Chevrolet Tahoe. This vehicle was tested at the EPA test facility in our area and it was determined that there is no communication with the PCM.

Tech Tip: Coil-On-Plug Misfire Diagnostic Tips for Ford/Lincoln/Mercury Engines

The misfiring cylinder must be identified through Self-Test misfire codes or through WDS Power Balance. Rule out base engine problems; rule out fuel problems; and then look at ignition problems (be sure to rule out coil primary circuit issues).

Tech Tip: Don’t ‘Blow By’ PCV Inspections

Most emission control parts, like the PCV valve, require little if any scheduled maintenance, but replacement may be necessary if the Check Engine light is on, the vehicle has failed an emissions test or is experiencing a driveability problem. Other emission control components include the exhaust gas recirculation (EGR) valve, the evaporative emission control system (EVAP) vapor canister and purge valves, the catalytic converter, oxygen sensors and all of the engine’s other engine management sensors.

‘Exploring’ Service Needs On The Ford 4.0L V6 Engine

Rated at a rather anemic 210 horsepower, the 4.0L SOHC V6 is not exactly a high output engine. It also has an unusual overhead cam drive setup. Unlike most other OHC V6 and V8 engines that drive both overhead cams directly from the crankshaft with a belt or chain, this engine has an intermediate jackshaft in the middle of the block where a pushrod cam would normally be located.

Tenneco Supplying Emission Control Technologies On 2014 Chevrolet Corvette Stingray

Tenneco announced it is supplying key emission control technologies, including electrical valves, for the 2014 Chevrolet Corvette Stingray, one of the most highly anticipated vehicles debuting in 2013. Considered one of the key performance features of the car, the Corvette’s exhaust system delivers a unique signature sound.

A/C Update: German Automakers To Develop CO2 A/C Systems

Geneva International Motor Show exhibitors Volkswagen, Daimler AG, Porsche, Audi and BMW agree to develop CO2 A/C systems for their vehicles.

Tech Talk: Biomass or Bio Mess?

Addressing the issues associated with ‘Home Brewed’ Bio-Diesel

Dorman Products Releases March New Product Announcement Featuring More Than 115 Parts

Dorman Products has released its March New Product Announcement, featuring 117 new parts, 29 of which are exclusive formerly “Dealer Only” parts.