What is the difference between throttle body and carburetor

When a throttle body is not functioning correctly, some noticeable characteristics may be poor or very low idle. This can include stalling when coming to a stop or very low idle after starting, or even stalling if the throttle is quickly pressed resulting in the throttle body plate opening and closing very quickly. So here's what happens when you step on the accelerator : The accelerator pedal is connected to a throttle valve, which lets air into the engine. Stepping on the pedal lets more air into your engine.

The ECU has sensors to monitor the air entering the engine and the oxygen in the exhaust to fine tune the fuel delivery. Point at the idle adjust screw, tell them what it does , then hit them with something heavy. A carburettor delivers a fuel -air mixture to the engine while a fuel injector delivers a carefully calibrated amount of fuel to it.

The primary difference is that a carburettor depends on fuel beinf sucked into very by the stream of the air intake while an injector uses a pump to deliver fuel to the engine. Is a throttle body better than a carburetor?

Category: automotive auto parts. 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.

The air and fuel mixture in the throttle body then travels through the intake valves and into the cylinders. Does cleaning throttle body make a difference?

How much horsepower does a carburetor add? When did carburetors stop being used? Are carburetors obsolete? Can you convert carb to fuel injection? How do you tell if a car has a carburetor? How much does it cost to change a carburetor to fuel injection? What is a Chevy TBI engine? How do you adjust a TBI? Set the parking brake and block the drive wheels. What is TBI engine? Can you drive with a bad throttle body? The electric motor opens and closes a valve so air can bypass the throttle plates.

Failure may cause stalling. Throttle Position Sensor TPS - A rheostat-like device that mounts on the throttle shaft to inform the computer about throttle opening. Failure may cause hesitation. Sensor must be carefully adjusted when installed to give an accurate voltage reading.

Airflow Sensor - Used to measure how much air is entering the engine so the appropriate amount of fuel can be delivered through the injectors. Basic types include the "flap" style used on many import and domestic Bosch systems, and the "heated filament" and "hot wire" mass airflow sensors.

Expensive to replace. Cold Start Valve - An auxiliary fuel injector that provides extra fuel enrichment when a cold engine is first started. If defective, can cause hard starting. TB cleaners, on the other hand, are lingerers; they sit in place for a while, breaking heavy carbon apart and leaving a slick surface to keep carbon and oil from sticking in the future.

Yes, you can use carburetor cleaner to clean a throttle body, but not without making a few compromises. Carb cleaner doesn't penetrate and hang around to break up heavy deposits, so you'll end up having to use more of it in multiple passes to remove heavy carbon buildup. And when you're done, you've got a TB that's squeaky clean, but will quickly accumulate more carbon and soot buildup.

Richard Rowe has been writing professionally since , specializing in automotive topics. He has worked as a tractor-trailer driver and mechanic, a rigger at a fire engine factory and as a race-car driver and builder. Basic Chemical Structure Both carb and TB cleaner contain between 20 and 30 percent acetone, which is a good all-purpose solvent for any kind of hydrocarbon.