Location of Fuel Pump Fuse

[92lasabre]

I am replacing the fuel filter on my 1992 LaSabre, and can't find the fuel pump fuse, which I need to pull to depressurize the system. I checked the fuse panel by the parking brake. No joy there. Same for the relay central under the hood. Anyone know where it is?

[buickmastermind]

I believe that the fuel pump is controlled by a relay located along the firewall under the hood.

[92lasabre]

I found the relay for the fuel pump motor, but the Haynes manual is pretty specific about a "Fuse", saying it would be located on the fuse panel under the console by the drivers left leg, or in the fuse central under the hood and against the firewall. I can't find it in either location. I guess I could pull the relay connector and see if that stops the pump, and consequently depressurizes the system.

All this to change a fuel filter!

['97ventureowner]

I'm not sure if this would work in your instance being a '92 ( with the body changeover in '92 yours may be different,) but when I de-pressurized my fuel system on my '90 Lesabre I just opened the gas cap. and put a rag over the fuel filter fitting and wore eye protection to loosen the fitting. It worked for me.

[92lasabre]

Thanks for the information. I probably do it that way if I can't find the fuse. It's messy, but works, and at least the filter is not in the engine compartment. I'll make sure the engine and exhaust components are nice and cool, disconnect the battery to make sure there is no spark, plus make sure the area is ventilated.

[spinne1]

Alldata's online service manual does not mention anything about a fuel pump fuse. It gives the following procedure for relieving the fuel pump pressure:

PROCEDURE:

Tool required: J34730-1 Fuel Pressure Gauge or equivalent.

1. Disconnect the negative battery cable, to avoid fuel pump turn on, if an accidental attempt is made to start the engine.
2. Loosen the fuel filler cap to relieve tank vapor pressure.
3. Connect the fuel pressure gauge to the pressure connection. (I believe this is near the intake manifold)
Wrap a shop towel around the fitting while connecting the gauge to avoid spillage.
4. Install bleed hose into an approved container and open the valve to bleed the system pressure. Fuel connections are now safe for servicing.
5. Drain any fuel remaining in the gauge into an approved container.

When repair to the fuel system has been completed, START the engine and check all connections that were loosened for leaks.

Hope this helps.

[92lasabre]

Thanks for the information. I'll post a note on this thread letting you know how it turned out.

[ifollowthelamb]

This is SOOOOO FRUSTRATING! I've searched my owner's manuel and the internet trying to find the fuel pump "fuse" on my '92 LaSabre, so that I can depressurize the fuel system to replace the fuel filter, and I CAN'T FIND IT ANYWHERE! Grrrr. [This looks to me like a conspiracy so that do-it-yourself-ers will think they must go to the dealer to have a simple job done; the real terrorists are the multinational corporations.]

[imidazol97]

Originally Posted by ifollowthelamb

This is SOOOOO FRUSTRATING! I've searched my owner's manuel and the internet trying to find the fuel pump "fuse" on my '92 LaSabre, so that I can depressurize the fuel system to replace the fuel filter, and I CAN'T FIND IT ANYWHERE! Grrrr. [This looks to me like a conspiracy so that do-it-yourself-ers will think they must go to the dealer to have a simple job done; the real terrorists are the multinational corporations.]

Plot theory solved:

The Relay Center fuse #6 is for the fuel pump on a 93 LeSabre. The Relay center is NOT the maxifuse center on the firewall. The RElay Center is above the passenger's right toe. It has two rows of fuses along the bottom. They are horizontal. The top row is 1-4, left to right; the bottom row is 5-8, left to right.

It should be a 20 amp fuse. Remove it, Crank the car and pressure is released. It'd be easier to use the shraeder valve on the fuel line on the motor on a COLD motor and a rag to release the pressure. OR use my method of a small kitchen towel around the connector on the fuel filter.

Does the new filter have a screw connection on one end or are both ends squeeze fittings/

[kok328]

You should be able to let it sit over night and the system will have lost pressure by morning.

P.S.- Don't turn the key on or the system will re-pressurize and you won't be able to work on it for a half a day or so.

[HotZ28]

Originally Posted by imidazol97

Plot theory solved:

The Relay Center fuse #6 is for the fuel pump on a 93 LeSabre. The Relay center is NOT the maxifuse center on the firewall. The RElay Center is above the passenger's right toe. It has two rows of fuses along the bottom. They are horizontal. The top row is 1-4, left to right; the bottom row is 5-8, left to right.

It should be a 20 amp fuse. Remove it, Crank the car and pressure is released. It'd be easier to use the shraeder valve on the fuel line on the motor on a COLD motor and a rag to release the pressure. OR use my method of a small kitchen towel around the connector on the fuel filter.

Does the new filter have a screw connection on one end or are both ends squeeze fittings/

PIC of the relay center below;

[falc]

I have a 1993 LeSabre and the fuel pump fuse is located on the passenger side near their feet, similar to where the driver side fuse panel is, except on the passenger side. There is a legend on the fuse panel cover there which states what each fuse is for. Hope this helps.