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Fuel Air Mixture

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Most all vehicles today run on gasoline or diesel fuel. In order to make the vehicle move, the fuel is mixed with air and burned in an engine. In order for this to work properly, an exact amount of air must be mixed with the proper amount of fuel. The "perfect" fuel air mix is called a "stoichiometric fuel ratio." This is 14.7 to one: 14.7 parts air to one part fuel. In reality most engines rarely achieve this ratio: they run a bit richer most of the time. an engine runs especially rich when accelerating, when cold, or when under a load.

If there is too much fuel and not enough air, the engine is said to be "running rich." It will have a gassy or rotten egg smell from the exhaust, and will make black smoke. If there is too much air and not enough fuel, the engine is said to be "running lean." It will have a foul-smelling exhaust that will burn your eyes, but no smoke.

Either condition will result in poor fuel mileage and possible engine damage. A lean motor will run hot.


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AT ECONOMECHANIX WE CAN CHECK YOUR FUEL SYSTEM FOR $35 OR LESS! GIVE US A CALL AT 352-376-5624.


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We also serve the surrounding communities of Alachua, High Springs, Hawthorne, and Newberry!

Thank you for visiting the ECONOMECHANIX WEB SITE. Please feel free to comment. We also serve the surrounding communities of Alachua, High Springs, Hawthorne, and Newberry! Gainesville has been my home since 1974, and I've loved Gvl and the Gators since I came here in the fall of 1974 to attend the University of Florida. I loved it so much I stayed and opened my car repair business. Originally it was out of the back of a 1963 Chevrolet wagon, but in 1977 a fellow mechanic and I opened an auto repair shop with actual walls, etc. I stayed in the same location for 26 years, and recently moved my operation to property I bought 15 miles east of Gainesville. I am doing most all the repairs myself now, having reduced my overhead from $1500 per month to practically nothing. I do work by appointment only. I mostly work only on my established customers cars, but I will occasionally take on new clients. E-mail me and I will either make arrangements to look at your car, or I will recommend you to someone who will.

George G. Scott, Jr.