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How to Use Fuel Pressure Test Kit

The fuel pressure test kit from O’Reilly Auto Parts includes everything you need to test fuel pressure on most vehicles, including a fuel pressure tester and gauge, adapters to fit fuel rail valves, and more. If you’d like to know more about how to test fuel pressure using the fuel pressure tester Loaner Tool, check out our informative video and step-by-step instructions before getting started.

Tools & Materials List

Step-by-Step Instructions

Additional Resources

Tools & Materials

Safety Eye Glasses Safety Glasses
Protective Gloves Safety Gloves
EverTough Fuel Pressure Test Kit EverTough Fuel Pressure Test Kit

Step-By-Step Instructions on How to Use a Fuel Pressure Test Kit

A fuel pressure testing kit can help diagnose fuel system issues on your vehicle, and allow you to better understand the performance of your fuel pump, fuel pressure regulator, and more. O’Reilly Auto Parts offers a fuel pressure tester as part of our Loaner Tool program, which allows you to pick up the tool with a refundable deposit and receive the full amount back when the tool is returned. The fuel pressure test kit and Loaner Tool program can help save you money on your car repairs and borrow tools that you may only need once.

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In three images, our expert lifts the hood of a 2008 Chevy Impala and locates the fuel rail Schrader valve.

Step 1: Locate Your Schrader Valve

Park in a well-ventilated area and wait for your engine to cool. Open the hood and find the Schrader valve on the fuel rail. Remove the valve cap, if equipped.

Do It Right: Check your vehicle's service manual or other resources to find the ideal fuel pressure for your vehicle.

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The fuel pressure tester is connected to the Schrader valve.

Step 2: Connect Your Fuel Pressure Tester

Find the fitting that allows the fuel pressure tester to connect securely to the valve, and thread it into place.

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Our expert turns the Impala’s ignition on, but doesn’t start the engine entirely.

Step 3: Turn On Your Ignition Switch

Turn the ignition switch to the “run” position, but don’t start the engine.

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The pressure test reading shows on the fuel pressure test gauge.

Step 4: Check Pressure Reading

Check the pressure reading on the gauge and wait five to ten minutes with the ignition in that position to make sure the fuel pressure holds steady

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Our expert turns the engine on.

Step 5: Turn Your Engine On

If the fuel pressure is appropriate to pass this test, and your vehicle can still be started, start your engine and let it idle. The pressure should remain constant within a few psi of your vehicle’s recommended pressure.

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The gas pedal is pressed to give some throttle. This is another test for the fuel pressure and should not put you in motion.

Step 6: Pump the Gas Pedal

Once your engine has warmed up, slowly give it more gas. You should see the fuel pressure rise as the RPMs increase.

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The Impala’s engine is turned off and the hood is left open for the engine to cool.

Step 7: Turn Off Your Engine

Shut off your engine and wait for it to cool.

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In three images, the fuel pressure test is disconnected from the Impala and the hood is closed.

Step 8: Disconnect the Fuel Tester

Once your engine has cooled, disconnect the tester and put the cap back on the valve. Close the hood.

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Additional Resources

Loaner Tool Program

Loaner Tool Program
Loaner Tool Series: How to Use an O2 Sensor Wrench & Socket Set

Loaner Tool Series: How to Use an O2 Sensor Wrench & Socket Set
Dashboard Warning Lights

Dashboard Warning Lights

The automotive repair work depicted in this series is performed under the direction of the manufacturer of the product featured. Prior to undertaking any of the demonstrated repairs on your vehicle, we suggest you consult with a certified mechanic or another professional who can adequately advise you of the proper repair or remedy required. O’Reilly Automotive Stores, Inc. and its affiliates (“O’Reilly”) disclaims any responsibility for injury or damage resulting from a viewer’s attempt to recreate the repairs shown in this series.

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