Mercedes Mullins
If you're looking to unhook a 99 Blazer fuel line, you've come to the right place. This process can be tricky, as it involves accessing the fuel tank and fuel pump, which are located in the middle of the frame at the back of the truck. Before starting, it's important to relieve any fuel pressure by removing the fuel cap and disconnecting the negative battery terminal. You'll also need a fuel line disconnect tool to unhook the fuel lines. Additionally, make sure to pre-soak any bolts or nuts with WD-40 and be cautious of any electrical connections on the top of the tank. It's also recommended to have a buddy assist you and to support the tank with a floor jack before removing the straps.
How to unhook a 99 Blazer fuel line
| Characteristics | Values |
|---|---|
| Vehicle | 1999 Chevy Blazer |
| Vehicle type | 6 cyl Four Wheel Drive Automatic |
| Fuel pump location | Directly in the middle of the frame at the back of the truck |
| Fuel line tool | Fuel line disconnect tool |
| Fuel line type | Standard reinforced 3/8 or 5/16 gas fuel line |
| Preparation | Park the vehicle in a spacious area, relieve fuel pressure by removing the fuel cap, disconnect the negative battery terminal, pre-soak bolts/nuts with WD-40 |
| Fuel pump removal | Remove skid plate, remove straps holding the fuel tank, lower the tank, disconnect fuel lines |
| Additional steps | Disconnect the Engine Coolant Temperature (ECT) sensor wire connector, remove the lower intake manifold bolts, remove the intake manifold assembly, ensure the fuel system ends are sealed |
| Notes | Pre-soaking bolts/nuts with WD-40 can help, ensure you know where everything hooks back up, be careful of dirt/debris entering the fuel system |
Explore related products
What You'll Learn
- Prepare the vehicle for work by relieving fuel pressure and disconnecting the battery
- Use a fuel line disconnect tool to separate the lines from the fuel pump
- Remove bolts and disconnect the harness, intake manifold, and skid plate
- Lower the fuel tank and disconnect the fuel and vent lines
- Reinstall new factory lines, ensuring they don't kink or bend
Prepare the vehicle for work by relieving fuel pressure and disconnecting the battery
To prepare a 1999 Chevrolet Blazer for work on the fuel line, there are several important steps to take to ensure your safety and that of the vehicle. Firstly, park the vehicle on a solid, level surface and engage the parking brake. Next, disconnect the battery. It is important to disconnect the negative battery cable first to prevent an electrical spark should a tool or equipment come in contact with an exposed electrical terminal. Failure to do so may result in personal injury or damage to the vehicle or its components. After disconnecting the negative cable, you can then disconnect the positive cable.
Once the battery is disconnected, you must drain the fuel from the tank. Refer to your vehicle's manual for instructions specific to your model. Typically, this will involve opening the fuel tank and allowing the fuel to drain into an appropriate container. Ensure you also disconnect the fuel fill hose and the vent hose from the fuel tank.
After draining the fuel, you will need to relieve fuel pressure. To do this, open the fuel cap and have an assistant turn the key to the "on" position while you listen at the filler opening. A functioning fuel pump will emit a soft hum for two to three seconds. If you do not hear this, it may indicate a problem with the fuel pump.
Now that the fuel pressure has been relieved, you can proceed with additional preparations as needed. These may include raising the vehicle, removing the left rear splash shield, and disconnecting various hoses and components, such as the fuel tank shield and fuel tank straps. Always exercise caution when working on a vehicle, especially when dealing with flammable liquids and electrical systems.
Best Places to Buy Rubber Fuel Lines
You may want to see also
Explore related products
Use a fuel line disconnect tool to separate the lines from the fuel pump
To unhook a 99 Blazer fuel line, you will need to remove the fuel tank and disconnect the fuel lines from the fuel pump. This can be done by using a fuel line disconnect tool.
A fuel line disconnect tool is a device that helps to separate the fuel lines from the fuel pump in your vehicle. It is an essential tool for proper maintenance and repair of your car's fuel system. When choosing a fuel line disconnect tool, it is important to opt for a metal one, as the plastic ones tend to be less durable and may break during the job. You can find these tools on Amazon, eBay, or Summit, and they are generally affordable and useful to have on hand.
To use a fuel line disconnect tool, begin by ensuring that the area is clean and free of dirt. This is important to prevent any debris from entering the lines or tank. Once the area is clean, place the tool onto the fuel line. You may need to push the line slightly to ensure that the tool is properly connected. The tool will help to free the tabs from the lip, allowing you to separate the fuel lines from the fuel pump.
It is worth noting that some vehicles may require a specific type of fuel line disconnect tool. For example, the Bestong Main Fuel Line Disconnect Tool is compatible with Toyota and Nissan vehicles with a 5/16" fuel rail. This tool has a hinged design and a tapered end, making it easy to insert into the fuel line connector, even in tight spaces.
Additionally, there are DIY methods to disconnect the fuel lines without a specialized tool. One method involves cutting a white BiC pen sleeve into a small cylinder, slicing it open, and slipping it over the line. Then, use pliers to press it into the fitting and spread open the wound coil spring, lifting it over the male fitting end. However, it is always recommended to use the appropriate tool whenever possible to ensure a safe and proper job.
Ford E350 Fuel Line: Understanding the Right Size
You may want to see also
Explore related products
Remove bolts and disconnect the harness, intake manifold, and skid plate
To remove the bolts and disconnect the harness, intake manifold, and skid plate, follow these steps:
First, open the hood and remove the battery. Disconnect any electrical connectors that tie into the manifold's wire harness and run to the long block. These connectors include the cam, crank, coolant temp, knock, and OCV sensors, as well as the air pump connections and coil packs.
Next, remove the air pump hose and connector. You can then undo the two bolts that attach the air pump to the car and set it aside. Disconnect the two main harness connections between the air pump and the battery.
Now, we will focus on the intake manifold. Disconnect the fuel supply and return lines at the rear of the lower intake manifold. Remove the pencil brace (A/C compressor bracket-to-lower intake manifold). Disengage the wiring harness connectors from the lower intake components, including the injector, EGR valve, and ECT sensor.
Remove the lower intake manifold retaining bolts, and then remove the manifold from the engine. Clean the gasket mounting surfaces with a putty knife and inspect the manifold for any warpage or cracks.
Finally, if your vehicle is equipped with a skid plate, remove it. This may involve additional steps, such as disconnecting the exhaust at the manifolds and loosening the hanger at the catalytic converter.
Best Hose Type for Fuel Line Repair: FKM Advantage
You may want to see also
Explore related products
Lower the fuel tank and disconnect the fuel and vent lines
To lower the fuel tank and disconnect the fuel and vent lines of a 1999 Chevy Blazer, you will need to grab an assistant, a floor jack, and a block of wood. Support the tank by placing the block of wood under it, and then remove the two straps holding the tank in place. Once the straps are removed, carefully lower the tank about 8 inches with the help of your assistant and the floor jack.
Now that the tank is lowered, you can proceed to disconnect the fuel and vent lines. First, blow off any dirt or debris from the top of the tank to prevent it from falling into the tank when you remove the sending unit. Then, disconnect the plugs on the sending unit, followed by the fuel lines. Be cautious and do not smoke during this process.
It is important to note that some people have reported difficulties in removing the body mounts and bolts. These bolts can be pretty hard, and rust can make them even more challenging to remove. In some cases, they may break during the removal process. If this happens, you may need to cut off the remaining part of the mount and use a vise grip or weld a nut onto what's left.
Additionally, when pulling out the old fuel lines and installing the new ones, it can be tricky to navigate them through the maze of the frame, body mount, and other obstacles without kinking or bending them. One suggestion is to remove a body mount or two to gain better access from outside the frame rail.
Quickly Fixing a Leaking Fuel Line: Temporary Solutions
You may want to see also
Explore related products
Reinstall new factory lines, ensuring they don't kink or bend
When reinstalling new factory lines, it is important to take your time to ensure they don't kink or bend, which can restrict fuel flow. One way to do this is to use a tubing bender, which can be purchased cheaply or even loaned for free from some auto stores. This will help you achieve smooth, kink-free bends.
If you are installing pre-bent factory lines, you will need to be creative in snaking them through the body of the car without causing kinks or bends. One suggestion is to remove some body mounts to allow for easier access and a clearer path for the lines. It is also important to ensure that the lines are the correct length, as lines that are too long can be difficult to install and may be more prone to kinking or bending.
If you are installing a new fuel line in the factory location, you can use the pre-bent lines, which are convenient and effective. However, if you are installing a new line in a custom location, you may need to use a bending tool to create smooth, kink-free bends that match the path you have chosen.
Finally, it is worth noting that some aftermarket fuel lines may be of lower quality and more prone to kinking or bending. It is recommended to use OEM (Original Equipment Manufacturer) fuel lines if possible, as they are designed to fit your specific vehicle and are less likely to cause issues.
Best Tool Size to Disconnect F250 Fuel Line
You may want to see also
Frequently asked questions
You will need to drop the tank and use a fuel line disconnect tool to unhook the fuel lines safely.
Yes, park your vehicle in a spacious area and remove the fuel cap to relieve any fuel pressure.
Disconnect the negative battery terminal. It is also helpful to pre-soak any required bolts/nuts with WD-40.
There are three lines and two electrical connectors to remove from the fuel pump, as well as the filler and vent hoses from the back of the tank. Label the lines or take pictures with your phone to remember where everything hooks back up.
Support the tank with a jack and disconnect one side, allowing the tank to lower slightly. Then, disconnect the fuel and vent lines.
