All New Jersey registered, diesel vehicles with a registered GVW (gross vehicle weight) of 18,000 lbs and above are required to be tested for diesel emissions by a licensed diesel emission inspection facility within 90 days of their month of registration renewal. Vehicles which pass the emission test will be issued an inspection sticker valid for one year. For inspection, you must have a valid drivers license, registration, and proof of insurance.
Effective December 2009, revised opacity cut points take effect.
Cut Points:
- Pre-1991: 40%
- 1991-1996: 30%
- 1997 and newer: 20%
Diesel PIF provide inspections and certifications as required by MVC:
- Engine emissions
- Exhaust system and emission control apparatus
- Governor (if applicable)
- Emission control system (if applicable)
- Any inspection item not in another category
Emissions Tests:
Diesel PIF's may set their own fee for inspection and may not charge sales tax for the inspection or the inspection sticker. Your vehicle must complete one of the following tests:
- Rolling acceleration test is performed on all electronically controlled heavy-duty diesel vehicles with low-speed engines and idle speeds less than 1600 rpm, or with engine speed rise times during the snap acceleration of over 1.7 seconds
- Stall acceleration test is conducted on all heavy-duty diesel vehicles with GVWR of 18,000 pounds or more that are equipped with medium or high-speed diesel engines and automatic transmissions
- Snap acceleration test is used on all heavy-duty diesel vehicles with GVWR of 18,000 pounds or more that are equipped with low-speed engines and manual or automatic transmissions, or equipped with medium-speed engines and manual transmissions
Exempt Vehicles:
- All Diesel-fueled motor vehicles with a gross vehicle weight rating (GVWR) 8,501 pounds to 17,999 that are plated commercial. The owner or lessee is required to inspected these vehicles.
- All diesel powered vehicles with a gross vehicle weight rating (GVWR) 8,501 to 17,999 that are plated passenger, not for profit, governmental, commuter van, farmer or farm truck except buses
- All diesel powered vehicles model year 1996 and older that are plated passenger, not for profit, governmental, commuter van, farmer or farm truck except buses
- Omnibuses which are subject to inspection by the Commission‘s Commercial Bus Inspection and Investigation Unit
- School buses which are subject to inspection by the Commission‘s School Bus Inspection Unit
