Question about 1990 Pontiac Grand Prix

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Fuel pump problems

How do you locate the fuel pump relay on a 1990 Pontiac se all wheel drive?

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Under hood pass. side.

Posted on Mar 03, 2011

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1 Answer

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Underneath your hood, behind the passenger side headlight, behind the core support, is a bank of 2-8 relays. One of those relays is the relay needed for your fuel pump. The fuse is also there. God-Bless!

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The fuel pump relay is mounted in the center/rear of the engine compartment, and is attached to the right side of the relay bracket.


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25709493-cixqw12rkpkyukark0skpttp-2-2.gif Hope this helps
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The fuel pump is usually located in/on the fuel tank, but with your jag, it is mounted externally from the tank. Frame mounted design with an inlet and outlet fitting...

Jack up the rear left hand side. Put the car on axle stands. Remove the left hand rear wheel.

You should be able to follow fuel line back to the fuel filter (just forward of the wheel arch) and then to the fuel pump which is behind wheel arch, (before the rear silencer/muffler).

One thing though, you might just have a faulty fuel pump relay, which on your 1990 can be found in the engine bay, left side, attached to the brake pedal hanger.

If you do decide to remove the fuel pump after all, then depressurize the fuel system first.

Remove fuel filler cap, disconnect the fuel pump relay, start engine and wait for it to stall. Turn off ignition, then disconnect battery.

Take all the usual precautions before disconnecting fuel lines, rags, container to catch spilt fuel etc.

Hope that helps, please rate me too thanks!

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