Kuntech KT9106 Smoke Machine Automotive Built-in Air Pump, 12V DC Smoke Leak Detector for Pipe System, Fuel Leakage, Leakage Diagnostic Tester for All Cars. [Automotive Smoke Machine KT9106] Kuntech KT9106 auto smoke machine is a professional machine for automotive pipe system leak detection, will help you find leaks and fix most general smoke leak problems.