The emission measurement procedure using the “free acceleration” method has caused many diesel vehicle owners to worry about engine impact.

A routine emissions test turned into a catastrophic engine failure for one Hyundai Palisade owner after a dealership ...

Know before you renew your registration.

The state of New Hampshire is asking a federal court of appeals to pause an order telling the state to resume its vehicle inspection program.

An optocoupler tester is a small device that helps verify whether an optocoupler is functioning properly or has failed. In labs and repair work, optocouplers often fail without clear signs. They may ...

A state legislator has introduced a bill that would exempt Lycoming County and six others from the state’s Vehicle Emissions Inspection and Maintenance (I/M) program. “I hear people loud and clear and ...

Wisconsin officials state Apogee Wausau Group, doing business as Linetec, violated numerous state environmental laws.

GE Vernova and Japan’s IHI Corp. have achieved a world-first by successfully testing 100% ...

There is enough global evidence that remote sensing works for vehicular pollution monitoring, and studies by several Indian ...

The new standards replace specifications from 1977 and aim to align India's automobile market with global efficiency and ...

Emissions test results are in on the city’s 120 petroleum storage tanks. One activist scientist says they are high enough “to merit serious attention,” while a Citgo spokesman says the company is ...