Ensure peak performance for your car with these essential maintenance maneuvers. Dive into the heart of your engine’s efficiency by mastering the art of cleaning the throttle body. Wondering why it’s crucial?
This guide not only unveils the reasons behind throttle body cleaning but also spills the secrets of how to clean the throttle body without breaking a sweat.
But you must learn the telltale signs that scream, “Clean me!” Or do not wait for any signal; clean it after every 30,000 km – recommended by manufacturers for the throttle body care and maintenance. Elevate your car care game and keep that engine purring at its best.
What is a Throttle Body?
The throttle body controls the air intake inside a car’s engine. For electronically fuel-injected cars, the throttle body works with different types of sensors to regulate the amount of air going into the ignition chamber.
A clean and functioning throttle body ensures good engine drivability. However, with time particles, dirt and varnish can accumulate in the throttle body.
This can lead to issues like rough idle, sluggish acceleration, stalling and reduced fuel economy. Therefore, timely cleaning is compulsory to ensure a smooth-running engine.
Why is it important to clean an engine’s throttle body?
Now that you know how to clean an engine’s throttle body, you may be wondering why it’s important to do so periodically.
The throttle body is responsible for augmenting the amount of oxygen that enters the engine based on the pressure you apply to the gas pedal.
Unlike other automotive components, like tires, engine oil, and drive belts, the throttle body isn’t something that you should typically have to replace regularly — unless it becomes extremely damaged or experiences a malfunction, that is.
However, over time, the throttle body can develop a buildup of gunk and carbon. When this occurs, it can reduce your engine’s performance and cause things like a drop in fuel mileage or issues like engine misfires.
Those problems are likely to occur because an excessive buildup of grime and gunk inside the throttle body can reduce airflow, interfere with the butterfly valve’s movement, and cause the throttle position sensor to collect inaccurate data.
Cleaning the throttle body helps address these issues by removing that gunk. As you probably gathered by reading the information above, the process is relatively simple, even if you don’t have a ton of automotive experience.
Given the benefits that a throttle body cleaning service can provide and the ease with which most people can perform it, there’s really no reason to skip this valuable maintenance project.
Signs of a Dirty Throttle Body
It might be difficult to pinpoint precisely which engine component is at fault if your car’s performance suffers. Not every driver knows that a filthy throttle body might harm their car.
Hence, if you are having issues with acceleration and your car’s overall performance, here are the most common signs of a dirty throttle body. If this sound familiar, it may be time to start cleaning.
- Stalling
- “Jumpy” or uneven acceleration
- poor fuel efficiency
- electrical problems
- sluggish idling
- Check Engine Light
- Airflow disruptions
Causes of a Clogged Throttle Body
- Accumulation of carbon deposits from engine oil or fuel additives.
- A build-up of dirt, debris, and grime from the air intake system.
- Contaminants from a malfunctioning air filter.
- Incomplete combustion leads to the formation of carbon deposits.
- Use of low-quality fuel or fuel with high ethanol content.
- Poor maintenance and infrequent cleaning of the throttle body.
Diagnosing the Problem
If you’re experiencing any of the aforementioned symptoms, it’s time to roll up your sleeves and start diagnosing the problem. Here’s how you can pinpoint whether the throttle body is the culprit:
Check for Trouble Codes
- Use an OBD2 scanner to check for any trouble codes related to the throttle body.
- Common codes include:
- P0121 (Throttle Position Sensor Circuit Range/Performance Problem)
- P0505 (Idle Air Control System Malfunction)
- P2111 (Throttle Actuator Control System Stuck Open)
Visual Inspection
- Remove the air intake duct to gain access to the throttle body.
- Visually inspect the throttle body for excessive carbon buildup or any obstructions that may be preventing the throttle plate from moving freely.
Symptom Analysis
- Pay close attention to the specific symptoms you’re experiencing.
- Rough idling, stalling, and hesitation on acceleration are often indicative of a dirty or faulty throttle body.
How to Clean Throttle Body without Removing It Step-By-Step Guide
The first thing to know how to clean the throttle body without removing it is preparing the workspace. This should be an outdoor place with good ventilation because the substances you shall use are volatile.
After choosing a proper place to do the job, you need to locate the throttle body under the hood in the engine compartment. Here are some tips for locating it easily:
- Throttle body is situated between the air cleaner and the intake manifold.
- Throttle body is made from aluminum.
- In some older models, the throttle body is connected to the gas pedal by metal wire, so you can identify it by pressing the gas pedal while the engine is shut off and see the moving part.
Once you find the throttle body, you have to be careful when dealing with it. This is because there are tubes and hoses and, in some cases, electrical connections attached to it.
Stay away from some of these parts since, in case anything goes wrong on them, it will be difficult to get them to their perfect state.
Tools & materials
Before starting this job, you have to prepare the tools and materials, which include:
- Screwdrivers set- Torx screwdrivers
- Soft toothbrush- In case of sticky stains and dirt
- Work light
- Pliers- To detach the clamps
- Safety goggles- Rubber gloves
- Throttle body cleaner- This is the main part of this guide. Pick this cleaner carefully to avoid damaging the internal parts and sensors attached to the throttle body. We recommend WD-40 Specialist Carb/Throttle Cleaner since it works fine and is safe to use along with the throttle body.
- Paper towel- For wiping dirt and stains.
With the right equipment and materials, now you can prepare the vehicle and the gear and start the cleaning process.
Step 1
For safety, disconnect the vehicle’s battery’s negative terminal to avoid any short circuits.
Step 2
Locate the big air duct that connects the throttle body to the air cleaner. It is usually locked with a metal clamp.
Using a screwdriver, try to loosen the screw and remove the air duct gently. Do this carefully. If there is an electrical wire connected to the air duct, disconnect it.
Step 3
Remove air ducts and hoses that will enable you to see the movable plate inside the throttle body. Take care not to damage any gaskets inside it.
Step 4
Put on your safety gear, rubber gloves, and safety goggles. Start spraying the throttle body cleaner inside the throttle body and use the brush to dislodge the sticky dirt. Be careful not to let any parts in the throttle body spill.
Step 5
Repeat the previous steps several. After every time, wipe away the dirt using a paper towel. Repeat the procedure until you see the bare metal is fully cleaned. Un-mount the idle sensor carefully, clean it, and dry it completely.
Step 6
Wipe the throttle body with paper towels to leave it dry. Ensure no liquid is left on the throttle body.
Step 7
Re-install the air ducts and tighten the clamps using the screwdriver or the Torx screwdriver.
Step 8
After re-installing the air ducts and any electrical connection you had removed, pick your tools and materials out of the engine compartment and re-attach the battery negative terminal. Now you can start the engine.
Step 9
It is normal to face some problems after cleaning the throttle body, such as starting the engine, stumbling, or unstable RPM. It is a result of some residues of the throttle cleaner burning in the intake manifold. Once it burns out, everything will get to normal.
Step 10
If you are asking yourself, does cleaning the throttle body make a difference? Take your car for a test drive, and you’ll feel the difference in the performance, fuel economy, and sound of the engine. This is the same procedure on how to clean the electronic throttle body.
Best Throttle Body Cleaners
By now, you are probably ready to clean your car’s throttle body and are wondering which throttle body cleaner is best. Here are the four best cleaners that you can find at your local auto parts store.
#1. CRC Throttle Body And Air-Intake Cleaner.
This product from CRC is one of the best, and it is safe in all fuel-injection systems. This cleaner will remove varnish, carbon, and gum buildup inside the throttle body.
It can improve fuel economy and help resolve any rough idling or sticky gas pedal issues. Using the product is simple, as you only need to spray the cleaner into the throttle body and use a rag to wipe off any excess cleaner.
#2. WD-40 Specialist Carb/Throttle Body Cleaner.
You probably already know that WD-40 makes great products, but you might not be aware of their throttle body cleaner. WD-40’s throttle body cleaner is an excellent option for both fuel-injected systems and carburetors.
However, you should only use this cleaner on non-painted metal surfaces. It will not damage O2 sensors or catalytic converters upon incidental contact, and the powerful formula dissolves deposits and blasts them away to leave behind no residue.
You should have a fast and easy startup from your engine with a smooth idle after using this product.
#3. Johnsen’s Throttle Body & Air Intake Cleaner.
Johnsen’s cleaner is designed to clean your throttle body and other air intake openings in your fuel injection system. This product works on both metal and plastic surfaces, and it will clean carbon buildup and other deposits out of the system.
After use, you should see an improvement in hard starting and engine performance. This cleaner also meets VOC requirements in all 50 states, so this is a good option wherever you may live.
#4. Valvoline Carb And Throttle Body Cleaner.
Valvoline is a name that has been trusted in the automotive industry for many years, and its throttle body cleaner does not disappoint. This product is a heavy-duty cleaner that dissolves deposits instantly to restore power back to your engine.
You can expect to see an improvement in stumbling and hesitation, as well as fuel economy. This cleaner meets VOC requirements in 49 states, but Valvoline also sells a California-compliant formula as well.
Preventing Future Buildup
To prevent future buildup and prolong the life of your throttle body, it’s essential to follow a few preventive maintenance practices:
- Follow the Manufacturer’s Maintenance Schedule
- Most manufacturers recommend regular throttle body cleaning as part of their maintenance schedule.
- Adhering to this schedule can help prevent excessive buildup.
- Use Quality Air Filters
- Regularly replacing your vehicle’s air filters can help prevent dirt and debris from entering the throttle body and causing buildup.
- Consider Fuel Induction Services
- Fuel induction services, which involve cleaning the entire fuel system, including the throttle body, can be an effective way to remove carbon deposits and prevent future buildup.
Tips for Best Results
Follow these tips to get the best results from throttle body cleaning:
- Use a quality cleaning solution from a reputable brand.
- Avoid over-spraying into the throttle body.
- Allow the engine to run for a few minutes after reassembly.
- Clean your throttle body every 30,000 miles or as needed.
Cost Considerations
If you choose to have a professional mechanic clean or replace your throttle body, the cost can vary depending on your location and the make and model of your vehicle. Here’s a general breakdown of the costs:
| Service | Cost Range |
|---|---|
| Throttle Body Cleaning (Professional) | $100 – $200 |
| Throttle Body Replacement | $300 – $600 (or more) |
| DIY Cleaning (Cost of Cleaner) | $10 – $20 |
If the throttle body needs to be replaced, the cost can range from $300 to $600 or more, depending on the vehicle and the cost of the replacement part.
However, if you choose to clean the throttle body yourself, the cost will be significantly lower, as you’ll only need to purchase the throttle body cleaner, which typically costs between $10 and $20.
FAQs.
Q: Does Cleaning Throttle Body Make a Difference?
Sure. Cleaning the throttle body makes a difference in car performance and drivability. It is a solution to anyone experiencing rough running of the engine, unstable running of the vehicle, and decreased vehicle performance when still brand new.
Q: Can You Clean the Throttle Body While the Engine Is Running?
Yes. However, the entire throttle-cleaning solvent will go into the combustion chamber. This substance is very harsh on gaskets and oil seals.
It may, therefore, damage these parts if they got exposed too much of this substance. It is safer that you clean the throttle body with the engine off.
Q: What Is the Best Throttle Body Cleaner?
Specialty and certified throttle cleaners are the ideal cleaners to use on your throttle body. These cleaners are manufactured from environmentally friendly substances.
The cleaners do not harm the engine’s internal parts. One amazing cleaner to consider is CRC 05078 Throttle Body and Air-Intake Cleaner.
Q: Can I Use Carb Cleaner on the Throttle Body?
Yes. You can use a carb cleaner, but the carb cleaner does not hang on the heavy dirt. You will, therefore, have to use more of it to get rid of all carbon build-ups.
Q: How Much Does a Throttle Body Cleaning Cost?
Throttle body cleaning costs are not very high. A throttle body cleaner costs about $6, and you can use it for 3 full cleaning cycles. Other tools you will require are basic maintenance tools. The process of cleaning your throttle body is, therefore, not expensive.
Final Words
By now, you know how to clean the throttle body without removing it, how to tell if the throttle body needs cleaning and the required tools. You should understand that this is preventive maintenance carried out to maintain your car’s condition at its best.
If you still find it challenging to clean your throttle body, it is advisable to seek professional help.
Do not go through the process if you are uncomfortable since you can end up damaging some parts. Also, remember to wear safety goggles to protect yourself from harsh substances.