If there is vacuum leaking, then the computer must shoot for a “fuel rich” condition to prevent running lean, which could cause pre-detonation.
If your vehicle has a engine vacuum leak, the air-fuel ratio in your engine will be higher than 14.7:1, also called a “lean” mixture.
So, You suspect that your vehicle has vacuum leaking, read on to learn the most common symptoms, as well as how to fix them.
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What is interesting about an engine leak is it can look like something else. You may think that there is a problem with the ignition, but an engine vacuum leak is something a little bit more. The air/fuel ratio is very important in the proper workings of an engine. The proper amount of air has to be present, or else combustion efforts are greatly reduced. The leak can result in air that is not properly measured entering into the engine. That upsets the balance and the result can be the engine having some difficulties.
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