Cadillac Srx Fuel Injector Replacement Guide

Replacing the fuel injectors on a Cadillac SRX can be a complex task and is not recommended as a DIY job due to the risk of fire and the potential to cause further damage to the vehicle. The average cost for a professional to replace the fuel injectors on a 2015 Cadillac SRX is between $1,113 and $1,272, with labour estimated at $290-$366 and parts costing $823-$906.

The fuel injectors regulate the amount of pressurised fuel used for each engine cycle, and there is one injector per cylinder. When a fuel injector fails or clogs, engine power is reduced and misfires will occur. The check engine light will turn on, and the engine may stall immediately after starting, fail to start, hesitate under throttle or vibrate roughly.

If you are experiencing any of these issues, it is recommended to take your Cadillac SRX to a qualified technician to have the fuel injectors inspected and replaced if necessary.

Disconnecting the battery and taking fire precautions

Disconnecting the Battery:

• Locate the battery in your Cadillac SRX. It is usually found in the engine compartment or the trunk.
• Identify the negative (-) and positive (+) terminals on the battery.
• Disconnect the negative terminal first using an appropriate-sized wrench or socket. Loosen the nut or bolt securing the cable to the terminal and remove the cable.
• Cover the disconnected terminal with a piece of electrical tape or a terminal cover to prevent accidental contact.
• Repeat the process for the positive terminal.
• Ensure that the battery cables cannot come into contact with the battery terminals, causing a short circuit.

Taking Fire Precautions:

• Wear appropriate safety gear, including safety goggles, gloves, and a respirator.
• Keep a fire extinguisher nearby and ensure it is fully charged and easily accessible.
• Cover any nearby flammable materials or move them away from the work area.
• If possible, work in a well-ventilated area to prevent the buildup of flammable fumes.
• Avoid smoking or any open flames near the vehicle.
• Be cautious when working with fuel. Wipe up any spills immediately and dispose of rags or materials soaked with fuel properly.
• Do not allow any sparks or flames near the fuel system.
• Ensure all electrical connections are secure and insulated to prevent arcing or short circuits.
• Inspect the fuel lines and hoses for any signs of damage or leaks. Replace them if necessary.
• If you notice any fuel leaks during the repair process, address them immediately. Absorb the fuel with an appropriate absorbent material and dispose of it safely.
• Do not attempt to start the engine until all fuel injector replacements and connections are secure.
• Once the repair is complete, reconnect the battery, ensuring the positive terminal is connected first, followed by the negative terminal.

Remember, working with fuel injectors can be dangerous, so it is essential to take these precautions seriously and work carefully.

Removing the engine cover and intake tube

To remove the engine cover and intake tube of your Cadillac SRX, start by locating the fuel line on the right side of the engine. Remove the lock and use a fuel line removal tool to disconnect the line. Push the line towards the back of the truck to fully detach it from the fuel rail.

Next, remove the quick connector for the purge solenoid and alternator, as well as the grounding bolt on the alternator mounting bracket. There may also be a bolt on the top of the intake holding the wiring harness in place, so be sure to remove that as well.

On the right side, you will also find the purge valve, which is held in place by a 10 mm bolt. This bolt also holds the fuel rail down, so be sure to remove it. There is another bolt at the back of the fuel rail that you will need to take out.

Now, move to the left side of the fuel rail. Here, you will find a bolt in the front and another bolt at the back with a small bracket that mounts to the intake manifold.

With all the bolts removed, you can now carefully lift and remove the engine cover and intake tube. Remember to note the direction the injectors are facing to avoid confusion during reinstallation.

Removing the fuel line

To remove the fuel line of your Cadillac SRX, start by locating the fuel line on the right side of the engine. You will need to remove the lock and then pull the fuel line towards you. Insert a fuel line removal tool and push the line towards the back of the truck to detach it from the fuel rail.

Next, remove the quick connector for the purge solenoid and alternator. There is also a grounding bolt on the alternator mounting bracket that you will need to remove. Additionally, there is a bolt on the top of the intake that holds the wiring harness in place. This bolt also holds the purge valve, which is located on the right side and is secured by a 10 mm bolt.

The bolt mentioned above also holds the fuel rail down, so you will need to remove it. There is another bolt at the back of the fuel rail that needs to be removed as well. On the left side of the fuel rail, you will find a bolt in the front and a bracket mounted to the intake manifold that holds the back bolt in place.

At this point, you will need to address the wiring harness ends on the injectors. These can be challenging to remove, and you may need to use a very small flat tip tool to pull up the locks. Once the wiring harness is free, pull the fuel rail straight up to pop the injectors out of their holes. It is important to remember the direction the injectors are facing, especially on the left side, as they can spin and cause difficulty when reinstalling.

The injectors are secured by clips that need to be carefully pried off. When reinstalling the injectors, ensure that the clips seat properly in the indentions on the injectors.

Removing the quick connector for the purge solenoid and alternator

To remove the quick connector for the purge solenoid and alternator of a Cadillac SRX, follow these steps:

First, remove the engine cover and the intake tube. The fuel line is on the right side of the engine. Remove the lock, then pull the fuel line towards you and insert the fuel line removal tool. After that, push the line towards the back of the truck to remove it from the fuel rail.

Now, you can remove the quick connector for the purge solenoid and alternator. There is also a grounding bolt on the alternator mounting bracket on the right side. On the top of the intake, there may be a bolt holding the wiring harness.

To access the purge valve, which is also on the right side, you will need to remove a 10 mm bolt. This bolt also holds the fuel rail down. There is another bolt at the back of the fuel rail.

On the left side of the fuel rail, there is a bolt in the front, and the back bolt has a little bracket that mounts to the intake manifold.

Remember to pay attention to the direction the injectors are facing when you remove the fuel rail. The right side is east due to the fuel line connection, but the left side can spin around.

The injectors are held on by clips, so carefully pry them off, making sure to seat the clip in the indention on the injector when reinstalling.

Finally, to reinstall, simply reverse the removal process. Cycle the key without starting and check for leaks. Install the intake tube and then start the engine, checking again for leaks.

Removing the wiring harness

To remove the wiring harness, first locate the bolt on the top of the intake manifold that holds the wiring harness in place. Remove this bolt, which should be a 10 mm bolt. Next, carefully disconnect the wiring harness ends from the injectors. This can be tricky, and a small flat-tip tool may be needed to pull up the locks. Be sure to note the direction the injectors are facing, as the left side can spin around, which may cause issues when reinstalling. Once the wiring harness ends are disconnected, carefully pry off the injector clips with a small tool.

Frequently asked questions