Ameer Randolph
Cleaning your 22RE fuel injectors can be a complex process. While some opt for on-car cleaning, others suggest that off-car cleaning is the gold standard. This involves disabling the fuel pump and having the engine idle through a cleaner like Berryman's, or adding a fuel system cleaner to your tank. Another method is to remove the injectors and send them for professional cleaning, but this can result in fuel spills. It's important to note that some cleaning methods, such as using water, can damage your engine. Before attempting any cleaning, it's recommended to take photos of your engine to ensure proper reassembly.
Characteristics and Values Table for Cleaning 22RE Fuel Injectors
| Characteristics | Values |
|---|---|
| On-car cleaning method | Disable the fuel pump and have the engine idle through a cleaner |
| Off-car cleaning method | Remove injectors and send them for professional cleaning |
| Fuel system cleaner | Redline fuel injector cleaner |
| Alternative method | Pour a can of SeaFoam into the last 1/4 tank of fuel and drive for 20-30 miles |
| Minimising fuel spills | Place a rag around the cold start injector when loosening the bolt |
| Avoiding damage | Take photos of the engine before starting work |
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What You'll Learn
On-car vs. off-car cleaning
There are two main ways to clean 22RE fuel injectors: on-car and off-car cleaning. Off-car cleaning is considered the "gold standard", but it is more expensive and time-consuming than on-car cleaning.
On-Car Cleaning
On-car cleaning is a more convenient and affordable option for cleaning 22RE fuel injectors. This method involves disabling the fuel pump and having the engine idle through a cleaning solution. However, it is important to note that the fuel system is a closed system, so you cannot simply open it up and expect it to run. One way to get around this is to put a fuel system cleaner in your tank. There are also some unknown methods for on-car cleaning, such as removing the brake booster vacuum line and pouring a small amount of water down the hose while holding the RPMs at around 2000. However, this method may not effectively clean the injectors and can be dangerous if too much water is introduced, potentially causing engine damage.
Off-Car Cleaning
Off-car cleaning typically involves removing the injectors from the engine and sending them to a professional service for cleaning. This method is more thorough than on-car cleaning and ensures that the injectors are properly cleaned and checked. It also allows for the adjustment of spray patterns, which is not possible with on-car cleaning. Off-car cleaning is generally recommended if you are already planning to remove the injectors for other maintenance or repairs.
Preventative Measures
To maintain the performance of your fuel injectors and prevent the need for frequent cleaning, it is recommended to use quality gasoline and, occasionally, a bottle of fuel-injector cleaner added to the gas tank. This can help to keep your fuel injectors working properly and prevent issues such as rough idling, stalling, and poor acceleration.
Additionally, some manufacturers recommend using a fuel-injector cleaning additive, especially if you do not always use Top Tier gas. These additives are typically poured into the tank before filling it with gasoline, allowing the two to mix thoroughly. However, it is important to read the instructions, as the usage frequency of these additives can vary, and using them too often may cause problems.
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Using a fuel system cleaner
There are many fuel injector cleaners on the market, such as Techron Fuel Injector Cleaner, Lucas Injector Cleaner, or Berryman B-12 Chemtool, which can be commonly found at most auto parts retailers. These products are designed to break down deposits in the injectors. Simply add the recommended amount of cleaner to your fuel tank and drive as usual to let the cleaner work through the system.
For a more thorough cleaning, consider using a fuel injector cleaner kit. This process requires disconnecting the fuel rail and throttle body and attaching the cleaner directly to the system. The cleaner runs through the injectors without interference from fuel in the tank, providing a deep clean that removes stubborn buildup. Some types of cleaning kits come in an aerosol can, while more professional-grade kits require a source of compressed air to force their compounds through the injector plug and blow any contaminants out of the nozzle.
If your injectors are heavily clogged, you may need to remove them for manual cleaning. Soak the injectors in a dedicated injector cleaner fluid, then use compressed air to blow through the injectors to remove any remaining debris. Cover all openings and seals properly during this process. Turn on the cleaning kit's pump and allow the cleaning solution to run through the injectors for about 15 to 30 minutes, depending on the level of clogging and the specifications of your cleaning kit. Once the cleaning process is complete, reattach the fuel rail with the injectors to the engine and ensure all injectors are properly seated.
To prevent clogged fuel injectors in the future, use fuel additives periodically and keep your fuel system clean. For vehicles stored long-term, pour a fuel stabilizer additive into the tank and plan to run the engine for at least a few minutes every couple of weeks to keep the fuel flowing. Checking the fuel tank cap for a secure fit and ensuring no contaminants enter the fuel system can also help maintain injector performance.
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Removing the brake booster vacuum line
Firstly, locate the brake booster vacuum line. This is usually found near the brake master cylinder, connected to the brake booster. Ensure that the engine is off and cool before beginning any work. Place a rag under the vacuum line to catch any spills or debris. Using the correct tools, carefully loosen and remove the vacuum line from the brake booster. You may need to use a line wrench or a similar tool to avoid damage to the fittings. Once removed, inspect the line for any cracks, leaks, or damage. If the line is damaged, it should be replaced.
Next, have an assistant enter the vehicle and start the engine. They should slowly increase the RPMs to around 2,000. With the engine running, carefully pour a small amount of clean water down the vacuum line. Be extremely cautious not to pour too much water, as this can cause serious engine damage, including hydrolocking. After pouring the water, your assistant should slowly lower the RPMs back to idle.
Finally, reconnect the vacuum line to the brake booster. Ensure that it is securely tightened to avoid any leaks. Start the engine and check for any leaks or unusual noises. If you notice any issues, stop the engine immediately and recheck your work.
As mentioned, this method of cleaning 22RE fuel injectors is not recommended and can be dangerous if not performed correctly. It is important to exercise extreme caution and have a basic understanding of engine mechanics before attempting this procedure.
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Taking photos of the engine before starting
Taking multiple photos from different angles will ensure you have a clear visual reference to work with. Close-up shots of specific parts and their connections can be especially helpful when it's time to put everything back together. For example, you could take photos of the vacuum lines, wiring harness, and small hoses before removing them.
Having these photos will make the reassembly process faster and more efficient, as you won't need to rely solely on your memory or external resources to determine where each part goes. It can be easy to forget the exact placement of certain components, especially if it's been a while since you started the project or if you're working with a complex engine setup.
Additionally, these photos can serve as a valuable record of the disassembly process, which can be useful for future reference or if you plan to document your work. They can also help you identify any potential issues or problems that may arise during the cleaning and reassembly process.
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Minimising fuel spills
Firstly, it is important to relieve the pressure in the system before you start. One way to do this is to unplug the fuel pump at the fuel pump, and remember to plug it back in once the pressure is relieved. You can also try loosening the gas cap.
Another method to minimise spills is to place a rag around the cold start injector and then loosen the bolt securing the banjo fitting to the injector. As you break the torque, the pressure will deplete, and the rag will absorb the fuel.
Before you begin, it is also a good idea to take several photos of the engine and its components. This will help you remember where everything goes when you're putting it back together.
Additionally, make sure to use new copper washers and snug them up, as the bolts are likely hollow and may be made of aluminium.
Finally, some people suggest removing the brake booster vacuum line, having someone hold the RPMs around 2000, and then pouring a small amount of water down the hose. However, this method is considered "unknown" for a reason, as it can potentially hydrolock the engine and cause serious damage.
Remember, always exercise caution when working on your vehicle and refer to a professional if you are unsure about any steps in the process.
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Frequently asked questions
One way to clean them is to remove the brake booster vacuum line, have someone inside hold the RPMs up around 2k, and then pour a slight amount of water down the hose. Another way is to put a fuel system cleaner in your tank.
Take several photos of the engine before you start. Then, pull the fuel rail to remove the injectors.
Place a rag around the cold start injector and then loosen the bolt securing the banjo fitting to the injector. As soon as you break the torque, the pressure will be depleted and the rag will take care of the mess.
