SAE J1667 Snap Acceleration Smoke Test Procedure for Heavy-Duty Powered Vehicles Categories Topics Enforcement Programs Enforcement of Clean Truck Check HD I/M Regulation Type Reports Society of Automotive Engineers (SAE) J1667 Recommended PracticeSnap Acceleration Smoke Test Procedure for Heavy-Duty Powered Vehicles Documents saej1667 SAEJ1667R.PDF · 530 KB Related Resources Program Information & FAQs Cargo Tank Certification Decal and Tank Number Display Requirements California State of Emergency (January 7, 2025): Sale, Offer for Sale, and Importation of U.S. EPA Certified Portable Generators into California