SAE J1667 Recommended Practice Categories Topics Enforcement Programs Heavy-Duty Diesel Inspection & Periodic Smoke Inspection Programs Type Reports Society of Automotive Engineers (SAE) J1667 Recommended PracticeSnap Acceleration Smoke Test Procedure for Heavy-Duty Powered Vehicles Documents saej1667 PDF · 530 KB Related Resources Hoja de datos de inactividad Idling Fact Sheet LCFS Enforcement