Modern fuel-injected cars have a fuel pressure regulator to monitor the fuel coming from the tank and going into the intake manifold. There is a recommended amount of pressure of fuel that has to go in depending on the model of the car, and the fuel pressure regulator constantly checks if this pressure is correct. When the regulator goes bad or becomes damaged, it will not be able to monitor the incoming fuel pressure. This may have adverse effects on the performance of your vehicle and could cause you to experience acceleration loss or even stalling. In this case, the fuel pressure regulator must be replaced.
- Open-end wrench set
- Snap ring pliers
- Fuel pressure gauge with hose
Step 1: Preparations
Open your car’s hood and disconnect the battery from its terminals. This is to make sure that there is no electrical current running through the system of the car while you are working on this project to avoid electric shock. Use an open-end wrench to accomplish this. It is also better that you work with a cold engine so it won’t be difficult to maneuver around the components.
Step 2: Draining the Fuel Pump
Remove the fuel cap by simply unscrewing it. Set it aside for use later. Now locate the pressure relief valve. It will be covered by a cap, so you will have to remove the cap using a wrench. Now screw the fuel pressure gauge where the cap was. Direct the hose of the gauge going into the bucket and press the pressure relief knob. Fuel should drain into the bucket.
Step 3: Freeing the Fuel Pressure Regulator
Now locate the fuel pressure regulator in the engine. It can be found near the intake manifold. You will see various lines connected to the regulator. Clean any dirt or debris from these lines before you disconnect them. You want to be sure nothing gets into the lines. Once you have cleaned them, disconnect them carefully. You don’t need any tools for this one since they are just most likely plugged on. The connected wires will vary from each vehicle and some may have a vacuum line.
Step 4: Removing the Fuel Pressure Regulator
Once the fuel regulator is free from all wires it was connected to, it’s time to remove the whole thing. Start by loosening any bolts that are securing the regulator onto the engine or engine bay. Loosen the bolts carefully one at a time using the wrench set that you have. Be careful not to let the bolts fall into the engine because you will be using them later. Set them aside in a safe place along with the other bolts you removed earlier in the project. Get your snap ring pliers and work on the snap ring that is connected around the regulator. This can usually be found below the vacuum line. Remove the snap ring carefully and set it aside. Your fuel pressure regulator should be completely disconnected, but it may take a little bit of force to get it off the intake manifold.