Mercedes Mullins
Replacing a fuel injector on a Chrysler LHS can be a challenging task, especially for those unfamiliar with car maintenance and repair. While some people choose to take their car to a mechanic or dealership, others opt for a DIY approach. Online forums and video tutorials provide a wealth of information for those considering the latter option. Before attempting any repairs, it is crucial to have a basic understanding of fuel injectors, the fuel system, and safety precautions when working with gasoline. Additionally, having the necessary tools and a suitable workspace is essential.
What You'll Learn
How to identify a bad fuel injector
A bad fuel injector can cause noticeable issues with your Chrysler LHS's performance and, if left unaddressed, can lead to severe engine damage. Here are some ways to identify a bad fuel injector:
Engine Misfires
Dirty or faulty fuel injectors can cause the engine to misfire, making the motor feel like it is sputtering and sending vibrations through the car. This happens when the delicate balance between fuel and air entering the engine is disrupted.
Rough Idling
If your vehicle sputters and shakes when you're at a stop sign or stuck in traffic, it may be due to dirty fuel injectors. "Rough Idling" is typically characterised by varying revolutions per minute (RPMs), even when your foot is off the gas pedal. This can sometimes lead to engine stalling, causing a sudden stop in RPMs and engine noise, making it feel like you've run out of gas.
Poor Fuel Economy
When fuel injectors aren't functioning properly, your vehicle's PCM (powertrain control module) won't be able to maintain the optimal air/fuel ratio and timing for combustion. As a result, you'll experience a decrease in fuel mileage.
Loss of Power and Poor Acceleration
Bad fuel injectors can cause an incorrect air-fuel ratio, leading to misfires in your engine. This will result in a loss of power and acceleration, making it difficult for your vehicle to perform optimally. You may notice sluggish performance and a lack of responsiveness when pressing the accelerator.
Difficulty Starting
Clogged or damaged fuel injectors may not be able to provide the necessary fuel to start your engine. This can lead to longer cranking times or multiple attempts to start the engine. In severe cases, the engine may not start at all.
Unusual Exhaust Smell
A damaged fuel injector can cause an unusual smell from your exhaust as excess or unburned fuel is released through the exhaust system.
Check Engine Light
A flashing or illuminated check engine light on your dashboard could indicate a dirty or malfunctioning fuel injector. This warning light is triggered when the engine control module detects an issue with the fuel/air mixture, indicating that the injector is supplying too little or too much fuel to the engine.
Fuel Leak
Fuel injectors are subject to heat and moisture over time, which can cause the rubber seals or the injector itself to crack and leak fuel.
If you notice any of these symptoms, it is important to address the issue promptly to prevent further damage to your vehicle and ensure optimal performance.
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The cost of replacing a fuel injector
It is worth noting that the cost of replacing a fuel injector can be influenced by the engine size, as larger engines have more fuel cylinders, and the number of cylinders can impact the labor costs. Additionally, regular maintenance and cleaning of fuel injectors can help extend their lifespan and reduce the frequency of replacement.
When replacing a fuel injector, it is recommended to use high-quality, OEM parts to ensure even power distribution across the engine and a proper air-fuel mixture for all cylinders. This will result in smoother engine performance. It is also advised to leave fuel injector replacement to professionals due to the risk of fire and the complexity of the task.
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The process of replacing a fuel injector
Step 1: Identify the Problem
Before replacing the fuel injector, it is important to identify whether it is indeed faulty. Common signs of a faulty fuel injector include a strong fuel smell, difficulty starting the car, and a rough engine idle. It is also possible to identify a faulty fuel injector by checking the spark plugs; if one of the spark plugs is wet with fuel, it indicates that the corresponding cylinder has a leaky injector.
Step 2: Purchase the Correct Parts
If you decide to replace the fuel injector yourself, it is important to purchase the correct parts. This includes not only the fuel injector but also the necessary tools and any required O-rings or other components. It is recommended to refer to a repair manual or seek advice from a mechanic or auto parts store to ensure you have everything you need.
Step 3: Remove the Old Fuel Injector
The next step is to locate the fuel injector and remove it. This process can vary depending on the make and model of your car. In some cases, you may need to remove other components, such as the fuel rail, to access the fuel injector. It is important to be careful when removing the fuel injector to avoid damaging any other parts or causing fuel leaks.
Step 4: Install the New Fuel Injector
Once the old fuel injector has been removed, you can install the new one. Make sure to follow the manufacturer's instructions and refer to a repair manual if necessary. It is important to ensure that the new fuel injector is properly seated and secured before starting the engine.
Step 5: Test the Vehicle
After installing the new fuel injector, it is important to test the vehicle to ensure that the problem has been resolved. Start the engine and pay attention to any unusual noises or smells. Take the vehicle for a test drive to ensure that it is running smoothly and that the new fuel injector is functioning properly.
Safety Precautions
When working on your vehicle, it is important to take the necessary safety precautions. This includes wearing protective gear, such as gloves and eye protection, and ensuring that the vehicle is parked in a well-ventilated area to avoid inhaling fumes. It is also crucial to disconnect the battery before beginning any work to prevent accidental electrical shorts.
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Fuel injector options for the Chrysler LHS
When it comes to fuel injectors for the Chrysler LHS, there are a variety of options available. It is important to ensure that you get an exact fit for your car. Here are some of the fuel injectors you can choose from:
GP Sorensen Fuel Injector
The GP Sorensen Fuel Injector comes in two models: 800-1462N and 800-1483N. Both options are available for standard delivery and in-store pickup.
AUS Remanufactured Fuel Injector
The AUS Remanufactured Fuel Injector comes in two models: MP-10541 and MP-10540. These injectors come with a $12 refundable core deposit and are available for standard delivery and in-store pickup.
AUS Injection Performance Fuel Injector
The AUS Injection Performance Fuel Injector, model MP-10600, is available for standard delivery and in-store pickup.
Continental / VDO Fuel Injector
The Continental / VDO Fuel Injector comes in two models: FI11336S and FI11346S. The FI11336S model is available for in-store pickup only, while the FI11346S model is available for standard delivery and in-store pickup.
Bosch Fuel Injector
Bosch offers a range of fuel injectors compatible with the Chrysler LHS, including the Bosch III UPGRADE fuel injectors and the #1 OEM Bosch III UPGRADE fuel injectors. These injectors are designed for specific Chrysler models and years, so be sure to check the compatibility with your vehicle.
Siemens Fuel Injectors
Siemens offers fuel injectors compatible with the Chrysler LHS, such as the Siemens Deka Reman Fuel Injector Set and the Siemens Fuel Injectors Set (6) 04591658AA. These injectors are also designed for specific Chrysler models and years, so ensure you select the correct part for your vehicle.
It is important to consult a professional or refer to a repair manual for guidance on how to safely and correctly replace a fuel injector in your Chrysler LHS.
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Safety precautions when replacing a fuel injector
Safety should be the top priority when replacing a fuel injector. Here are some detailed safety precautions to follow:
Disconnect the Battery
Before starting any work on the fuel injector, disconnect the battery to prevent electrical shocks or short circuits. This is a crucial step to avoid sparks that could ignite fuel vapours. Disconnect the negative terminal first, identified by a minus sign (-) or black cover, and then the positive terminal.
Work in a Well-Ventilated Area
It is important to work in a well-ventilated area to avoid inhaling harmful fumes that may be released during the replacement process. Ensure there is adequate airflow in the workspace.
Wear Protective Gear
Wear safety goggles and gloves at all times to protect your eyes and skin from fuel exposure and accidental injuries. Long rubber gloves can offer additional protection. It is also advisable to wear long sleeves and pants to avoid any fuel or debris coming into contact with your skin.
Have a Fire Extinguisher Nearby
Keep a fire extinguisher within reach as a precaution in case of any fuel spray or ignition. Ensure it is easily accessible and you know how to use it properly.
Relieve Fuel System Pressure
Before disconnecting any fuel lines or components, relieve the fuel system pressure to prevent unexpected fuel spray. You can do this by pressing a valve on the fuel line or pulling the fuel pump relay and cranking the engine for a few seconds.
Use Proper Tools and Techniques
Use proper lifting techniques and tools when working to avoid straining your back or muscles. Ensure all tools are in good condition to prevent slips or malfunctions during the replacement process.
No Smoking or Open Flames
Avoid smoking or using open flames in the workspace. Fuel is highly flammable, and any sparks or open flames can lead to a fire or explosion. Keep the workspace free from any potential ignition sources.
Clean the Work Area
Work in a clean area to prevent dirt and debris from contaminating the new fuel injector and fuel system. Keep the workspace organised by using a tray or container to hold removed parts and tools.
Follow Manufacturer's Instructions
Refer to the manufacturer's instructions for replacing the fuel injector. These instructions are designed with safety in mind for both the engine and the person working on it.
Isolate Engine Cooling Systems
If possible, isolate the engine cooling system before removing the fuel injector to reduce the risk of high-temperature water escaping and causing scalding. Consult the manufacturer's instructions for the recommended isolation procedure.
Conduct a Risk Assessment
Before starting any work, conduct a risk assessment to identify potential hazards and put control measures in place. This will help minimise the risk of accidents and ensure a safer working environment.
By following these safety precautions, you can significantly reduce the risk of accidents and ensure a safer and more effective fuel injector replacement process.
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Frequently asked questions
If your car is having starting troubles and you notice a strong fuel smell, you may have a bad fuel injector.
The cost of replacing a fuel injector can vary depending on the car model and the mechanic's rates, but it typically ranges from $350 to $1000.
Replacing a fuel injector can be a complex task, especially if you have no prior experience working on cars. It is recommended to seek assistance from a professional mechanic or someone with experience in car repairs.
To identify the bad fuel injector, let the car cool down, then remove the spark plugs and check if one is wet with fuel. That cylinder corresponds to the leaky injector.
Yes, you can try running a fuel injector cleaner through a couple of tanks of fuel. Products like Techron and Sea Foam can help remove residue and improve the performance of the injector.
