noun Automotive. a fuel-injection system in which an injector (throttle-body injector ) delivers fuel to a central location within the intake manifold of the engine. Abbreviation: TBI.

Direct fuel injection sprays fuel directly into the combustion chamber, while ported fuel injection sprays the intake manifold outside the valve. Throttle body fuel injection, while similar to a carburetor, has a separate throttle body with one fuel injector rather than fuel injectors located in each cylinder.

TBI stands for throttle-body injection, also known as the “brain” of the carburetor. A dual-plane aluminum intake manifold and a throttle body with two injectors are used in TBI systems to feed fuel to the engine.

In this page you can discover 51 synonyms, antonyms, idiomatic expressions, and related words for throttle, like: garrote, starter, gas, feed, gas feed, stifle, silence, suppress, restrict, accelerator and choke.

In a MPI system, each cylinder has its own individual injector. The injectors are mounted at each of the intake ports so fuel can be sprayed directly into the ports. A single throttle body meters the amount of air entering the intake manifold so the amount of fuel delivered can be matched to the engine’s needs.

ALL fuel injection can be classified as Electronic Fuel Injection (EFI). TBI is an EFI setup that utilizes Throttle Body Injection (looks like a carburetor). The TBI units have two injectors that meter the fuel for all the clyinders at once (again, similiar to a carburetor).

Remove the sensor from the throttle body using the torx-head driver. Twist it out of the throttle body and remove the sensor and the seal. Place the replacement throttle position sensor seal onto the throttle body. Install the throttle position sensor and then twist it 90 degrees to lock it into the mounting screws.

To adjust the throttle body, you’ll need to remove the AFM and hose so you can see the throttle plate. Loosen the idle stop screw lock nut. Unscrew the idle stop screw until it’s flush with the casting of the throttle body so it doesn’t effect the throttle position. Loosen the 8mm throttle plate lock screw on the throttle plate shaft.

A complete throttle body service is recommended every 15,000, 40,000, and 75,000 miles to be sure that the automobile is functioning properly. It is most important to have the throttle body serviced regularly to avoid the high cost of replacement.

Spray the injector or injectors with throttle body cleaner, and gently clean the exterior and the tip of the injector with the brush. Do not insert any metal objects into the tip of the injector, as this will enlarge the nozzle tip, permanently damaging the injector.