Fuel Pump Worked Again After Buying New Inertia Switch

The fuel pump shut off switch is designed to undo the power to the fuel pump when a vehicle comes to an instant stop. Near vehicles today have an inertia switch most the main air bag module with a reset push. If the fuel pressure switch turns off the ability to the fuel pump during normal vehicle operation, and then the reset push can be pressed to reset the switch and resume power to the fuel pump.

The fuel cutting-off switch is a safety reset switch which starts the fuel pump and allows gas period to the engine. If you get striking and it is only a minor fender-bough, the fuel pump may shut off; you will know when you lot try to offset the car again and the engine just turns but doesn't get-go.

At this point, just striking the reset button and yous're on your fashion. In the event of a major collision, where the gas line is ruptured, it prevents the fuel pump from spewing gas continuously and increasing the chances of burn or explosion. All vehicles have a reset switch, but nearly of them need a dealer to access it after a collision.

It works much similar a circuit billow in your home. If you blow a circuit at home, you tin become to the circuit-billow box and push in the scarlet push button or toggle the lever from off to on to reset that circuit.

Part one of v: Knowing the signs of failure

If your vehicle drives ordinarily and then all suddenly the engine shuts off and does not restart, the fuel pump shut off switch may take tripped. Sometimes the fuel pump close off switch may toggle on and off repeatedly, making the engine audio similar it is having an consequence with a fuel regulator.

The engine should be revving up and downward while information technology is at idle but not revving up and downwardly while driving. This can damage the engine injectors and the transmission, every bit it may non be shifting correctly.

If the fuel pump shut off switch fails, the engine management arrangement records this event. A fuel pressure sensor lets the computer know of a subtract more than than five psi (pounds per square inch). The fuel pump shut off switch is wired from the bombardment to the ignition switch to the vehicle's calculator and to the fuel pump. If the switch loses communication from whatsoever office of the vehicle, the switch activates.

There are several engine calorie-free codes associated with the fuel pump close off switch:

P0005, P0006, P0007, P0087, P0230.

Part 2 of 5: Verifying the fuel pump close off switch status

Step i: Plough the key to run position. Locate the reset push to the fuel pump shut off switch.

Printing and agree the reset button for about xx seconds.

• Note: The fuel pump shut off switch reset button is normally located either under the dash in the driver compartment or under the commuter or passenger seat. Just motion the seat forward and pull dorsum on the carpet or popping off the cover nether the seat to access the switch.

Step 2: Attempt to start the engine. If the switch is defective, the engine volition not start upward.

However, if the switch is resetting itself, and then the engine will start up and then shut off.

Part three of five: Replacing the fuel pump close off switch

Materials Needed

• Allen wrench gear up
• Boxed terminate wrenches
• Electrical cleaner
• Flashlight
• Flathead screwdriver
• Ratchet with metric and standard sockets
• Torques fleck set
• Cycle chocks

Step 1: Park your vehicle on a flat, hard surface. Make sure that the transmission is in park (for automatics) or in 1st gear (for manuals).

Step 2: Place wheel chocks around the rear tires. In this case, the wheel chocks go around the front tires since the rear of the vehicle will exist lifted up.

Engage the parking brake to the lock the rear tires from moving.

Step 3: Install a nine volt bombardment saver into your cigarette lighter. This keeps your reckoner alive and your settings currently in the vehicle.

If yous do not have a 9 volt battery saver, that is ok.

Step 4: Open the vehicle's hood to disconnect your battery. Accept the basis cable off of the battery'due south negative post disabling the ability to the fuel pump and sending unit.

If your switch is under the nuance:

Step 5: Locate the fuel pump shut off switch under the dash. Remove the harness attached to the switch.

Remove the mounting hardware securing the switch to the firewall or bracket under the dash.

Stride 6: Remove the fuel pump close off switch. Apply electrical cleaner and make clean the contacts on the harness to the switch.

Step vii: Install the switch. Secure it with the mounting hardware.

Footstep 8: Connect the harness to the switch.

If the switch is located behind the driver or passenger seat:

Footstep 9: Slide the seat forward all the way. Pull back on the carpet overlapping behind the seat.

Yous may need to remove some panels or stripping along the side of the cab to remove the carpet.

Step x: Locate the fuel pump shut off switch under the nuance. Remove the harness attached to the switch.

Remove the mounting hardware securing the switch to the floor board.

Step 11: Remove the fuel pump shut off switch. Use electrical cleaner and clean the contacts on the harness to the switch.

• Annotation: You may have to remove a encompass to go to the switch. The cover may be mounted past tabs or screws.

Step 12: Install the switch. Secure information technology with the mounting hardware.

Step 13: Connect the harness to the switch.

• Annotation: If you had to remove any rug, be certain to put the carpet back and any panels or stripping that secures the carpet in place.

Step xiv: Slide the seat back into the position it was originally ready for.

Part four of 5: Checking for proper functionality

Stride 1: Reconnect the battery. Reconnect the footing cable back onto the battery'southward negative post.

Remove the nine volt battery saver from the cigarette lighter.

• Notation: If you did not have a ix volt battery saver, you will have to reset all of the settings in your vehicle, like your radio, electrical seats, and electric mirrors. If y'all had a nine volt bombardment saver, you will need to clear the engine codes if whatever before starting the vehicle up.

Step 2: Tighten the battery clench up tight. Ensure that the connection is good.

Pace three: Turn the ignition key on. Heed for the fuel pump to actuate and plow off the ignition after the fuel pump stops making noise.

• Annotation: You volition need to cycle the ignition key on and off 3 to 4 time to ensure all the fuel track is full of fuel.

Step 4: Start the engine. Start the engine up and bank check to brand sure that the engine will stay running.

Step 5: Remove the wheel chocks from the rear wheels. Put these aside.

Part 5 of 5: Test bulldoze the vehicle

Step i: Drive the vehicle around the block. During the test, feel for any symptoms of the fuel cut out.

Likewise, accelerate the engine chop-chop to brand sure that the fuel pump is working correctly.

Step 2: Monitor the dash for whatsoever engine lights.

If your engine light comes on after replacing the fuel pump shut off switch, and so there may be further diagnosis of the fuel pump assembly needed or a possible electrical issue within the fuel system. If the problem persists, then accept one of YourMechanic's certified mechanics inspect the fuel pump shut off switch and perform a replacement.

The statements expressed in a higher place are only for informational purposes and should be independently verified. Please run into our terms of service for more than details

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Source: https://www.yourmechanic.com/article/how-to-replace-a-fuel-pump-shut-off-switch-by-marvin-sunderland

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