Mercedes Mullins
E-TEC fuel injectors are a self-contained pump that delivers a precise amount of fuel to achieve clean and complete combustion. They are highly accurate and resilient. However, they can become contaminated with hydrocarbons, dirt, and ethanol, leading to poor engine performance. While injector and fuel system cleaners rarely do a good job, there are specialised cleaning services available for E-TEC injectors. It is also possible to clean them yourself by removing the aluminium housing to access the fine screens, but you cannot disassemble them further.
Characteristics and Values Table for E-TEC Fuel Injector Cleaning
| Characteristics | Values |
|---|---|
| Fuel injector contamination | Caused by hydrocarbons in fuels, dirt from marina pump stations, ethanol, old fuel in the tank, and fuel-based contaminants |
| Common issues | Rough-running engine, lack of power, watercraft unable to get on a plain, and engine damage |
| Cleaning methods | Fuel injector additive in gasoline, professional cleaning services, replacing contaminated parts |
| Professional cleaning services | Barnacle Bill's Marine Supply, Fuel Injector Precision, Florida Injection, The Injector Man |
| Testing and analysis | Visual and electronic checks, resistance testing, spray pattern testing, dynamic flow testing |
| Precautions | Numbering injectors before removal, cleaning VST tank and replacing filters, ensuring proper fuel system maintenance |
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What You'll Learn
E-Tec injector cleaning services
E-TEC fuel injectors are a self-contained pump that delivers a precise amount of fuel to achieve clean and complete combustion, guaranteeing full power output and clean emissions. However, contaminants like hydrocarbons in fuels, dirt from marina pump stations, and ethanol can cause the injectors to malfunction, leading to issues like rough engine running and reduced power.
To address these issues, some companies offer E-Tec injector cleaning services, which include cleaning, testing, and analysis. These services are important because injector systems are susceptible to contamination, which can lead to costly and severe engine damage.
One company, Fuel Injector Precision, specializes in cleaning E-Tec injectors for vehicles like snowmobiles and ski-doos. They use ultrasound technology to clean and refurbish the injectors. They are a benchmark in Canada for vehicles equipped with E-Tec injectors.
Barnacle Bill's Marine Supply also offers E-Tec injector cleaning services and has factory-trained technicians. They provide PDF service manuals, parts, and kits for Evinrude E-TEC owners.
Additionally, some companies use specialized electronic equipment to visually and electronically check for discrepancies in E-Tec injectors. They test resistance, spray patterns, and dynamic flow. Injectors with a resistance below 2 Ohms cannot be repaired and must be replaced.
It is important to note that E-TEC injectors are a welded assembly and cannot be entirely disassembled for cleaning. However, the aluminum housing can be removed to access and clean the fine screens. Proper maintenance of E-Tec injectors can help them outlast the engine.
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Common causes of contamination
E-TEC fuel injectors are a self-contained pump that delivers a precise amount of fuel to achieve clean and complete combustion. This guarantees full power output and clean emissions. However, these injectors can become contaminated and dirty, leading to serious and costly damage.
One of the most common causes of contamination in E-TEC injectors is the presence of hydrocarbons and dirt in the fuel. These contaminants can pass through the filter system and enter the injector, causing it to malfunction. Sludge, gunk, and shellac caused by old fuel in the tank can also lead to injector contamination. Ethanol is another common contaminant that can cause E-TEC injectors to malfunction.
Additionally, the fuel injector's internal o-rings can fail, leading to external fuel leakage. This usually occurs around the plastic connector molded to the metal injector body. While this may not cause any noticeable driving issues, it can result in a fuel odor, especially during initial start-up or when the vehicle has been sitting for a while.
Furthermore, poor spray patterns, grime, clogging, and leaking nozzles can also contribute to injector contamination and poor engine performance. Contamination in one injector can quickly spread to other injectors, causing a range of problems, from rough engine running to complete engine failure.
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Removing and cleaning injectors
E-TEC injectors are a welded assembly and cannot be taken completely apart for cleaning or servicing. However, they can be removed and cleaned, and the process should be done carefully to avoid any damage.
Firstly, it is important to label each injector and the engine side of the plug before removing them. This is crucial as all E-TEC injectors must go back to the same cylinder they were removed from. The most challenging part of the removal process is often detaching the orange ignition wire from the injector plug. Online videos can be helpful for this step. Once the injectors are removed, they can be sent for professional cleaning.
Before removing the injectors, one should ensure that the fuel system is clean. This includes checking and cleaning the inside of the VST tank and replacing all filters. It is also recommended to test the resistance of the injectors before cleaning. Injectors with a resistance below 2 Ohms cannot be repaired and will need to be replaced.
When cleaning E-TEC injectors, the aluminium housing can be removed to access the fine screens that can be cleaned. However, it is important to note that the internal electrical components of the injector should not be altered, as this can change its behaviour. Additionally, a new seal kit should be installed if the injector is taken apart.
Some people recommend using a fuel injector additive in the gasoline to unclog any restrictions. Products like Seafoam, Techron, and Berryman's can be used for this purpose, but it is important to research the specific engine's requirements.
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Fuel injector additives
E-TEC fuel injectors are a self-contained pump that delivers precise fuel amounts to achieve clean and complete combustion, guaranteeing full power output and clean emissions. However, contaminants like hydrocarbons, dirt, old fuel, and ethanol can cause E-TEC injectors to malfunction, leading to issues like rough engine operation and reduced performance.
To maintain optimal performance and prevent engine damage, regular cleaning and the use of fuel injector additives are essential. Fuel injector additives are designed to remove sludge, gunk, and deposits from injectors and other fuel system components. Here are some key points about fuel injector additives:
- Effectiveness: Fuel injector additives can effectively clean injectors and improve engine performance. However, some products may require multiple uses or larger quantities for severely clogged injectors.
- Types of Additives: Additives are available for both gas-powered engines and diesel engines. Some additives are also suitable for older, carbureted vehicles.
- Benefits: Using fuel injector additives can increase fuel economy, enhance horsepower, reduce emissions, and extend engine life. They can also help prevent mechanical issues and keep your engine running smoothly.
- Timeframe for Results: While some additives may take several tanks of fuel to show noticeable improvements, others, like AMSOIL P.i.®, claim to deliver results after just one tank of fuel.
- Lubrication: Some additives provide lubrication benefits, helping to improve engine performance and protect against ethanol-related corrosion.
- Concentration: The concentration of cleaning agents in the additive is crucial. Some products may not contain sufficient concentrations, leading to slower or less dramatic results.
It is important to select reputable and potent fuel injector additives, such as AMSOIL P.i.®, to ensure effective cleaning and performance improvement. Regular use of additives can help maintain a well-functioning fuel system and prevent the need for more frequent injector cleaning services.
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Testing and analysis services
Fuel Injector Precision offers a testing and analysis service for E-Tec injectors. The company has been offering ultrasonic cleaning, testing, and analysis services for hundreds of injectors across Quebec and Canada since 2012. The service includes a free report of tests performed after cleaning, allowing customers to know if any injectors need to be replaced. The company also provides a 5-step process for cleaning E-Tec injectors, ensuring quality results.
Fuel Injector USA also offers a similar service, guaranteeing a 24-hour turnaround time and perfect performance. They provide before and after injector flow test metrics and ensure 100% cleanliness and optimal performance post-service. The company has 28+ years of experience servicing gasoline injectors and charges a flat fee of $39.99 per injector.
It is important to test the resistance, spray patterns, and dynamic flow of E-Tec injectors. Injectors with a resistance below 2 Ohms cannot be repaired and must be replaced. Additionally, checking the ohms on the injector is crucial, with a reading between 2 and 3 ohms indicating a clean injector.
Before reinstalling serviced E-Tec injectors, it is recommended to disassemble, clean, and inspect the VST tank and return filter. It is also important to replace all fuel filters and ensure the fuel system is clean to avoid any potential issues.
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Frequently asked questions
E-TEC injectors are a welded-up assembly and cannot be taken all the way apart to be cleaned or serviced. However, the aluminum housing can be removed to access the fine screens that can be cleaned if needed.
Poor spray patterns, grime, clogging, leaking, and flow-restricted nozzles are all signs of a poorly running two-stroke engine that may be caused by dirty E-TEC injectors.
If not taken care of, contaminated injectors have the ability to cause serious and expensive damage. Most engine failures are caused by detonation, a lean condition caused by dirty injectors.
First, label each injector and the engine side of the plug before removing them. Make sure to start with injector 6 as most of the fuel in the lines will drain out. You can then send them for professional cleaning.
There are several companies that offer E-TEC injector cleaning services, including Barnacle Bill's Marine Supply, InjectorRx, and Fuel Injector Precision.
