Replacing Fuel Pump In 1999 Oldsmobile Intrigue: Step-By-Step Guide

Replacing the fuel pump on a 1999 Oldsmobile Intrigue can be done without removing the fuel tank. Access to the fuel pump is through the trunk. To begin, open the trunk and remove the liner to expose a cover. After removing the cover, a special tool is recommended to remove the locking ring. From there, the fuel pump supply and return hoses, EVAP system hoses, and electrical connections to the pump must be removed. Once the pump is out, any reusable brackets and pick-up screens can be attached to the new pump before installing it.

Remove rear seat and trunk liner to access the fuel pump

To remove the rear seat of a 1999 Oldsmobile Intrigue, first, fold down the seatbacks. Then, locate and release the clips that are just under the front of the seat cushion. After that, fold down the seatbacks and remove the bolts across the top that retain the whole unit.

Once the rear seat is removed, you will be able to see the trunk liner. To remove it, open the trunk and simply lift it out. Be aware that there may be cables attached, so unhook these if necessary before removing the liner.

With the rear seat and trunk liner removed, you will now have access to the fuel pump.

Disconnect wires and hoses, then remove the locking ring

To disconnect the wires and hoses from your 1999 Oldsmobile Intrigue's fuel pump, you'll first need to access the pump itself. Open the trunk and remove the liner to expose a cover. Remove this cover, and you'll be able to see the fuel pump.

Now, to disconnect the wires and hoses:

First, disconnect the negative battery cable to prevent any electrical shorts while you work. Next, locate the fuel pump's electrical connector and carefully detach it. You may need to gently pry it loose with a small screwdriver. Once the connector is free, set it aside, being careful not to kink or damage the wires.

Now, locate the three hoses connected to the fuel pump. Two of these hoses attach to the front of the engine on the driver's side of the pump. Carefully detach these hoses, taking care not to spill any fuel. You may need to use a hose removal tool to do this without damaging the hoses. Place the detached hoses somewhere safe and free from dirt or debris.

With the wires and hoses disconnected, you're now ready to remove the locking ring. A special tool is recommended for this job, so make sure you have the correct equipment before proceeding. Once you have the tool, carefully insert it into the locking ring and turn it in the correct direction to loosen the ring. The locking ring should now be free, and you can proceed with removing the fuel pump.

Lift out the pump assembly

To lift out the pump assembly, you will need to remove the fuel pump from the tank through an access panel above the tank in the passenger compartment. If there is no access panel, you will need to drain the fuel from the tank and then lower the tank from the vehicle to access the pump.

In either case, you will need to remove the fuel pump supply and return hoses, as well as the EVAP system hoses and electrical connections to the pump. Once the pump is out, you can attach any reusable brackets and pick-up screens to the new pump before installing it.

Install the new pump and reverse the removal process

To install the new fuel pump, you will need to reverse the removal process.

First, carefully lower the new pump into the tank, ensuring that the float arm is in position. You will need to compress the three springs on the pump assembly while tapping the locking ring into place with a non-ferrous (brass or aluminium) drift. This is a two-person job, so make sure you have an extra pair of hands to help.

Next, reconnect the three hoses to the pump, taking care with the supply hose as it will be under pressure and may squirt gas. Then, plug in the two wire connectors.

Replace the metal panel on the floor of the trunk and put back the fibre lining, spare tire, and jack.

Finally, fill the tank with fuel and run the engine to test for leaks.

Test for leaks by adding fuel and running the engine

To test for leaks by adding fuel and running the engine of your 1999 Oldsmobile Intrigue, follow these steps:

First, ensure you are wearing protective gear, including work gloves, eye protection, and coveralls or long sleeves. It is also recommended to work outside or in a well-ventilated area, as fuel fumes can be dangerous.

Next, locate the fuel injectors on the engine manifold, positioned on top of the engine. Start the engine and let it run on idle. Inspect each fuel injector for signs of external leakage. If you notice any leaks, replace the O-ring.

Turn off the engine and ensure it is in Park or neutral gear. Open the hood and remove the negative battery terminal. If your air filter box is in the way, use a screwdriver to unscrew the fasteners holding it in place.

Now, you will need to disconnect the throttle socket or throttle cable. Carefully remove all wires along the way. Then, disconnect the socket on the injectors and unbolt the fuel rail. It is recommended to leave the fuel lines attached to the fuel rail to maintain adequate fuel pressure.

At this point, you can add fuel to the system and run the engine. Keep in mind that there are different methods to test for leaks, and you may want to consult your owner's manual for specific instructions for your vehicle.

One common method is to use a syringe to measure the fuel pressure. You can also use a multimeter to test the voltage on the injection sockets. Most vehicles have injectors with two pins, and you should not see variations above 3.70 and 3.89.

Another way to check for leaks is to use a diagnostic scanner, also known as an on-board diagnostics (OBD) reader. This device can read the data from your vehicle's computer system and help identify any errors or problems.

If you notice any signs of leakage during the testing process, be sure to address them promptly. Fuel leaks can be dangerous and should not be ignored.

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