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1995 Cadillac Seville disengaged emissions controls whenever heat or air conditioning was on. In 1995, General Motors was ordered to recall 470,000 model year 1991 through 1995 Cadillacs and pay an $11 million fine for programming the car's electronic control unit (ECU) to enrich the fuel mixture any time the car's air conditioning or cabin heat was operating, since the EPA tests are conducted ...
Engine manufacturer Cummins Inc. has agreed to pay a $1.675 billion penalty for allegedly installing "defeat devices" on approximately 1 million pickup trucks to cheat emissions tests.
In places where emissions testing is not required, a modification is by bypassing the computer and disabling the BBD's Idle Servo, or replacing the BBD with a manually tuned carburetor. Several vendors (including Chrysler and Edelbrock ) offer retrofit kits that replace the CEC and the carburetor with fuel injection.
Cummins Inc. has agreed to pay an over $1.67 billion penalty to settle claims by regulators that the engine manufacturer unlawfully altered hundreds of thousands of pickup truck engines to bypass ...
Early in the 1950s scientists discovered that vehicle emissions were a significant factor that had been causing the air quality to deteriorate. [7] This led to the introduction of vehicle emissions standards in California in 1966, furthermore due to the seriousness of the problem, in 1970 the Clean Air Act was introduced in order to regulate these standards all over the United States. [7]
The N.C. Division of Air Quality will ask the U.S. EPA to approve a plan to end annual emissions inspections in 18 of the 19 counties where it is still required.
In 1998, a Swedish researcher criticized the New European Driving Cycle standard for allowing large emission differences between test and reality. [81] The Washington Post also reported that in the late 1990s, EPA engineers at Virginia Testing Laboratory had built a system called ROVER, designed to test a car's emissions on the road. The ...
Basically, the HDIUT is an industry agreed to manufacturer run, in-use, on-road testing program. It builds upon the original NTE standard. It is designed to focus on compliance in the real world, and relies on emissions testing, utilizing Portable Emissions Measurement Systems (PEMS) with NOx, HC, CO and PM being the pollutants to be measured. [11]