THROTTLE BODY - GENERAL PART GUIDELINES

THROTTLE BODY - GENERAL PART GUIDELINES


GENERAL PART NOTES 



The throttle body is a tube containing a pivoting flat valve (butterfly) that is used to control the amount of air entering an engine. In an electronically fuel injected car, a throttle position sensor and air flow sensor communicate with the computer, which supplies the corresponding amount of fuel needed at the injectors.

On older carbureted engines, the throttle body is built into the carburator and via mechanical means and engine vacuum, more fuel is delivered as the valve opens. But that’s enough about carburetors...

On a fuel-injected engine the throttle body is normally located between the air filter and the intake manifold, and is connected to the gas pedal mechanically with a cable, or electronically by wire. When the driver presses the pedal the butterfly in the throttle body pivots to let more air flow into the manifold.

When that happens, the throttle position sensor reports to the ECU that you have stepped on the gas. And the airflow sensor detects more air and sends a message to the car’s computer to boost the amount of fuel being supplied by the injectors.


Most autos have just one large throttle body, but some larger-engined cars can have one for each bank of cylinders, or even one on every cylinder, although these are relatively uncommon. Some systems use a throttle body with two smaller throats and butterflies instead of one large one, notably the early Ford truck EFI motors, but the function is the same.

A good air filter is absolutely critical to the operation of the throttle body, because dirt buildup on its surface over time can gum up the butterfly, causing a rough idle and drivability issues. Depending on how the PCV breather is plumbed on your car’s motor, you may also get a build up of oil residue.

This is why the butterfly and throttle body need periodic cleaning. After removing it from the intake, clean the throttle body with an aerosol solvent carburetor/fuel injection cleaner and  small brush, or cotton cloth. Pay particular attention to the throttle butterfly, which is attached with small screws (often staked to the throttle pivot to prevent removal) but you don’t need to remove it to clean it.

If the throttle position sensor (TPS) or air flow sensor are on the throttle body, be careful with them. Removal of the TPS may require recalibration afterwards. Mass Air Flow (MAF) sensors are very sensitive to being contaminated, and have a specific solvent spray just for cleaning them.
 
Other throttle body problems can include faulty Idle Air Control (IAC) valves or Manifold Absolute Pressure (MAP) sensors. The IAC valve allows the computer to control idle speed, by bleeding small amounts of air into the intake. The MAP sensor turns engine vacuum in the manifold into an electronic signal, telling the computer how much fuel to inject.
 
An engine that revs high at idle, or with an idle that surges up and down, may have a vacuum leak, or a torn intake hose. A consistently high idle may mean the IAC valve is sticking open, or a mechanical throttle stop may need to be adjusted


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Components that will always be included with this item( if they are not with Part or damaged, it should be noted in description ) 

TPS - Throttle Positioning Sensor

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Components may be available at no charge i.e usually just left on Part but not charged extra for (if buyer requests these items make sure to confirm with operations that they are with the Part) 

N/A

 
Components not included usually but which maybe included at extra charge i.e not usually with part but we will have if required (if buyer requests these items make sure to confirm with operations that they are with the part )


N/A

SALES  -THINGS TO NOTE/UNDERSTAND  

if custoemr says its failure , almost always they will know from computer testing message 
this is not the type of part that can be fixed ( other than to fully clean it out to remove any dirt ) , its either good or not 




PRICING   -THINGS TO NOTE


BUYING  (JJ ) THINGS TO NOTE

No added value.

 DISMANTLING NOTES (JJ) –engine

Leave TPS sensor on Throttle body.

INVENTORY PART INSPECTION NOTES, (when inputting) (JJ)

Check TPS is not damaged/missing - make note if it is

 

GUIDE FOR TAKING IMAGES OF THIS PART(what to show) (JJ )


 Image of Plug if Fly by Wire type


DISPATCH (JJ ) THINGS TO NOTE




FAQ- SPECIFIC FOR THIS PART 



What does fly-by-wire means and how would I know if a throttle body is a fly-by-wire type?

Fly-by-wire means its being controlled electronically - No cable.
Standard (non Fly by wire) has a cable that runs directly from Accelerator pedal to throttle body

Does it include TPS (Throttle Positioning Sensor) ?

Yes. TPS Sensors are left on throttle body.