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Top 10 of 2013: Emissions tampering

Jason Cannon December 18, 2013

The ninth most popular article on Successful Dealer in 2o13 was an FYI piece from September on how not to find yourself on the wrong side of the law.

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If you provide engine service in your facilities, there’s a chance at some point a customer has asked you to modify his rig’s emission system.

While there’s no rule against asking, there are some pretty hefty violations associated with actually following through.

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Tampering with emissions equipment is prohibited in the commercial vehicle industry. The Environmental Protection Agency (EPA) is vigilant in investigating and prosecuting fleets, truck owners and service facilities found violating emissions tampering rules.

The force of its punishments can be extreme.

According to EPA guidelines, service providers can be found liable for emissions tampering not only for altering an engine, emission and associated electrical system, but also for not reporting — to the EPA, vehicle owner or both — when evidence of tampering is found in during engine-related service work.

Bill Puchniarz, manager, inline field services at Navistar, says emission tampering qualifies as “anything that takes a vehicle out of its EPA/CARB certified state.”

Removing a DPF or blocking its usage within an emission system is one of the most common methods for engine tampering, Puchniarz says. Other methods include alternating the after treatment system and electrical modifications, such as increasing the amount of fuel that is delivered to an engine or programming that diesel exhaust fluid (DEF) is being used when it is not.

To read the original article in its entirety, click here.

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