OK, Even I have used Carb Cleaner to test for vacuum leaks. But remember the warnings. Carb Cleaners are very volatile, poisonous mixtures of Xylene, Alcohol, Acetone, etc., and they can even dry out and deteriorate rubber with extended and/or repeated exposure. Sometimes an old mechanics trick really is an old mechanics "TRICK". If he sprays the injector seals, etc. with Carb Cleaner every time he works on the car, he will eventually find the leaks he caused. :-) Just my 2 cents. Gary IN2TIME