Can I locate wind and water leaks around windows and doors?
Yes, roll up all the windows and turn on the fresh air fan motor to the max setting. Make sure this is not set to re-circulate. From the outside of the car using a diffuser, (any short piece of hose with a diameter of about 5/8 placed over the nozzle to create a thicker flume of smoke) move the smoke around the area where a leak is suspected. Hold the smoke a few inches from the test area and search for the disturbance caused by the leak. Now mark the area and make the repair. This test must be conducted in still air; you may want to close the doors in the shop for this one.