Suppose you had a dual carb setup and suspected one or more small vacuum leaks which might be responsible for poor performance until the engine got warm. Also suppose you didn't have asbestos underdrawers and don't care to have a fire in your engine compartment. How would you go about finding this leak?
this makes as much sense as any for me. If you want to find the stumbling vaccum issue..............The air/fuel ratio is compromised, and when you introduce fuel to the mixture it will enrich the mixture and change the RPM in an obvious way. if you are painting , or spraying any type of fuel ( flamable stuff like Berrymans B12 ) you will get similar results. I have much experiemce looking for vaccum leaks,................in many different cars, and have used the B12 a lot because, it evaporates quickly, and leaves no residue. unlike just about any other "leak detector" I've used.
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