Fuel System Repair

For most of the 20th century, carburetors were the part of the fuel system responsible for mixing gasoline with the combustion chamber's proper amount of air.  They were also the source of many fuel system repair calls.  A carburetor relies on suction pressure created by the engine to draw in air. This air and fuel from the carburetor mix and are funneled by vacuum pressure into the cylinders. This design works pretty well but suffers when the engine revs at different RPMs. Since more throttle equals more fuel, the fuel is introduced into the engine linearly and can't make adjustments based on many factors that a fuel-injected system can. At 5000 RPM, an engine will need 30% more fuel than it does at 4,000 RPM. A carburetor will struggle to make it run as smoothly as newer fuel-injected engines in those instances.

Fuel injection can work electronically or mechanically. A mechanical fuel injection system works by mechanically metering the quantity of air going into the engine and the quantity of fuel going into the injectors.

Electronic fuel injection can be set up to work best for a specific use, such as towing or drag racing. This tuning takes less time than mechanical fuel injection and won't require tuning as much as a carbureted system.

Ultimately, the fuel system on modern-day vehicles is managed by the ECU, like just about everything else. ECU control is ideal since the ECU will identify engine problems and other vehicle issues that can sometimes be resolved with a software application update. On top of that, the electronic controls permit mechanics to pull up information from the engine and regularly. Electronic fuel injection offers customers with better fuel mileage and more consistent efficiency all around.