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The Ford Ranger's throttle body plays a crucial role in delivering air to the engine's combustion chambers, facilitating the right fuel-air mixture. When the accelerator pedal is depressed, the throttle opens, allowing more fuel to enter the cylinders. The functioning of the throttle body is dependent on the quantity of the air-fuel blend.

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Throughout its use, the throttle can accumulate dust and grime which get drawn in with the air.

This buildup starts to deposit on the throttle body, potentially interfering with its optimal functioning. When the throttle body becomes severely clogged, the Ford Ranger displays the corresponding symptoms. Signs of a congested throttle body include:

• Unsteady idle RPM;
  
• Stumbles upon pressing the accelerator;
  
• Reduced dynamism - sluggish acceleration;
  
• Increased fuel consumption and power loss
  

If these symptoms sound familiar and it's been a while since you last cleaned the throttle body, it may be time for a thorough cleanse.

What do you need to clean your Ford Ranger's throttle body?

The list of cleaning supplies is quite basic and you're likely to have them in your garage already.

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These include:

• Throttle body cleaner, or Throttle body and Air Intake cleaner (they're essentially the same);
  
• Carburetor cleaner - can be useful too;
  
• Brush;
  
• Cloth(s);
  
• Screwdriver
  

It is generally recommended to clean the throttle body roughly every 75,000 miles (121,000 km). While there's no stringent schedule, regular cleaning of the throttle body can noticeably improve your Ford Ranger's performance. If you observe any unusual symptoms, it may be a signal to start the cleaning process.

How to clean your Ford Ranger's throttle body?

You can choose to clean the throttle body in two ways - with or without detaching it from the Ranger. This post details the method that doesn't require you to remove the throttle body from the vehicle.

While this method may be less laborious, it is just as effective. However, if your throttle body is particularly dirty or not functioning as expected, you might find it more beneficial to remove and clean all its components.

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Disconnect the negative battery terminal



Start by disconnecting the negative terminal from the battery. This step is critical to depower the Ford Ranger, preventing any risk of electrical shocks.

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Detach the air duct from the throttle body

Next, unhook the air supply hose that leads from the air filter to the throttle. It's usually held in place by a clamp, but other attachment methods may be used - ensure it's properly disconnected before removing it.

Disconnect the hoses and sensors that are connected to the throttle



Several wires and pipes are linked to the throttle body. Some of these are sensors, while coolant runs through the tubes. When detaching the pipes, be sure to position them vertically and plug them with a spark plug to prevent any fluid leakages.

Label all sensors and hoses

After cleaning the throttle body of your Ford Ranger, you'll need to reassemble everything, and with an array of wires, it can be quite a task. Thus, label and mark everything you disconnect, ensuring you remember the exact positioning and can reassemble everything correctly post-cleaning.

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Apply throttle cleaner to the surface



Spray a good amount of cleaner onto the throttle body. Allow it some time to work its magic. For stubborn contaminants, let the cleaner sit for about 3-5 minutes; it should suffice to dissolve them.

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WD-40 Specialist Carb/Throttle Body & Parts Cleaner, 13.5 OZ
                    
Start manually cleaning your Ford Ranger's throttle body

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Once you've cleaned the throttle body, it's time to reassemble everything. Ensure everything functions as it should, with no abnormal sounds or symptoms after the reassembly.

How to adapt your Ford Ranger's throttle body

For more recent Ford Ranger models, the throttle is often electronically driven (actuated by an electric pulse, rather than a cable). A designated throttle position sensor is tasked with tracking the throttle blade's position. Prior to starting the engine, this blade is ideally positioned at a straight angle of 90 degrees.

Perfectly aligned with the top and bottom walls, it allows no excess air to sneak in. However, over time, grime accumulates on the air channel's walls or on the blade itself. This dirt prevents the throttle from completely closing, keeping it stuck in a certain position.

The sensor interprets this position, and the Ford Ranger's computer assumes this as the new reference value.



In essence, the throttle blade's neutral position becomes its reference (factory) value, taking into account the layer of grime that has accumulated. This is completely normal, as it's a factory-provisioned setting designed to maintain the engine in a working condition.

But, once you've cleaned the throttle body and restored the surface to its initial state, the Ranger's computer might get 'confused'.

Without any indicators to inform it that nothing is hindering the throttle blade from fully closing, the vehicle's computer will still assume that dirt is present, maintaining the blade position it remembers.

This results in a gap between the throttle walls and the blade, enabling at least a few millimeters of air to pass through.

Subsequently, the Ford Ranger's computer 'believes' that the throttle pedal is perpetually pressed, even if it's not, allowing more air to enter the cylinders through this newly created space.

This can have adverse effects on the engine as it continually senses a load, particularly noticeable at idle when the rpm could jump to 1500–2000 rpm from the usual 800 rpm. This could lead to overheating and reduced engine life.

Therefore, after cleaning the throttle valve, it's necessary to recalibrate the blade to its factory position.

The throttle valve adaptation process is fairly universal for numerous Ford Ranger models.

Firstly, warm up the engine to the operational temperature, then switch it off and wait for about 5-10 seconds. Turn on the ignition and wait another 3 seconds. Following this, press the throttle pedal 5 times in 5 seconds, then release it.

If this doesn't seem to help, it's possible that your Ford Ranger's system has a different programming. The throttle valve adaptation algorithm should be documented in your Ranger's owner's manual.

To Wrap Everything Up

Cleaning your Ford Ranger's throttle body is crucial because it prevents dirt from accumulating on the blade or from creating gaps between the blade and the body itself.

During this cleaning procedure, patience and precision are key to attaining the optimal result.