Can you have a carburetor and fuel injection?
Carbureted vs Fuel Injected. In carbureted engines, the fuel/air mixture meets in the carburetor. The mixture then goes to each cylinder through the air intakes. In the fuel injected engine, the fuel and air do not mix until they reach the cylinder.
Carburetors on cars operated the same way. To start the car, you had to pull out the choke and let the engine warm up. Modern fuel injection systems don't require this warm-up period. There are some very obscure auto makers, primarily in Africa and Russia, who still build cars with carburetors.
- In 1872, American George Brayton invented the first commercial liquid-fueled internal combustion engine. In 1876, Nikolaus Otto, working with Gottlieb Daimler and Wilhelm Maybach, patented the compressed charge, four-cycle engine. In 1879, Karl Benz patented a reliable two-stroke gas engine.
- The throttle (accelerator) linkage does not directly control the flow of liquid fuel. Instead, it actuates carburetor mechanisms which meter the flow of air being pulled into the engine. The speed of this flow, and therefore its pressure, determines the amount of fuel drawn into the airstream.
- A choke valve is sometimes installed in the carburetor of internal combustion engines. Its purpose is to restrict the flow of air, thereby enriching the fuel-air mixture while starting the engine. Chokes were nearly universal in automobiles until fuel injection began to supplant carburetors.
A TBI system is similar to a carburetor in that one or two injectors are located in a central throttle body that supplies fuel to the engine through the intake manifold. Instead of using engine vacuum to siphon fuel through metering circuits as a carburetor does, fuel is sprayed into the manifold through the injectors.
- A sequential fuel injection is a type of multi-port fuel injection system in which each injection valve will open just before the cylinder intake valve opens. So in essence, the individual injectors work by themselves because they are fired individually.
- Know what price you should pay to get your vehicle fixed. The average cost for a fuel injector replacement is between $913 and $1438. Labor costs are estimated between $88 and $311 while parts are priced between $825 and $1127. Estimate does not include taxes and fees.
- Fuel injector symptoms for bad, faulty, dirty, clogged, or leaking injectors are :
- Starting issues.
- Poor idle.
- Failed emissions.
- Poor Performance.
- Engine does not reach full RPM.
- Increased fuel consumption.
- Rough engine performance.
- Surging and bucking under various throttle loads.
Petrol engines can use gasoline direct injection, where the fuel is directly delivered into the combustion chamber, or indirect injection where the fuel is mixed with air before the intake stroke. On petrol engines, fuel injection replaced carburetors from the 1980s onward.
- The fuel injectors thereby spray a fine gasoline mist into the engine's intake manifold, which then delivers it to the engine for combustion with the oxygen that the engine is receiving. This mist makes for more efficient burning of the gas in combustion than if it were in droplet form.
- Jonas Hesselman
- Purchase a fuel injector cleaner kit.
- Review your vehicle's engine layout.
- Disconnect the fuel pump from the fuel injectors.
- Disconnect the pressure regulator vacuum line.
- Connect the cleaning kit to the fuel pressure test port.
- Remove the cap from the fuel tank.
- Turn the vehicle on and let the engine run.
Updated: 2nd October 2019