The OEMTOOLS EVAP/Smoke Diagnostic Leak Detector, No. 24684, is designed to quickly find leaks on cars and light duty trucks. It locates EVAP leaks and cooling system leaks, identifies intake and exhaust leaks, and finds wind and water intrusion. The EVAP/Smoke Diagnostic Leak Detector features variable flow control and an integrated regulator. In addition, it comes with OEM-approved smoke-producing fluid.