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2002 Buick Century Custom 3.1L Fuel Leak
01-18-2018, 05:30 PM
Post: #1
2002 Buick Century Custom 3.1L Fuel Leak
I recently tried to replace my injectors, now the fuel seems to be leaking in two different spots.

At one of the injectors, and I think it is leaking from this circle thing attached to the fuel line.

I have attached pictures.

Thanks for any help.

Nadeem
2002 Buick Century Custom 3.1L


.jpg  Fuel1.jpg (Size: 83.72 KB / Downloads: 3)


.jpg  Fuel2.jpg (Size: 92.55 KB / Downloads: 3)
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01-18-2018, 10:56 PM
Post: #2
RE: 2002 Buick Century Custom 3.1L Fuel Leak
The car is over 15 years old so I would not be surprised if something is leaking from disturbing things during the repair. After all, hoses get brittle and even steel lines are prone to issues from years of vibration. What I would do is clean things up with solvent and shop towels or compressed air then pressurize the system a few times by working the key WITHOUT starting the engine. (looks like the engine can't run right now anyway) Each time you flip the key to the on / off position the fuel pump should run for 2 seconds, which is enough to pump things up. At that point go around and check each suspect connection with a flashlight or a mirror. (to see the bottom) When you find the wet spot you will know what to repair / replace.

Not that familiar with this vintage Buick but I suspect the round thing in question might be a fuel pressure regulator, which would have an internal diaphragm and possibly leak through a small breather hole if the diaphragm has failed. If an injector is leaking you might want to see if it's still under warranty.

Let us know what you find.
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01-22-2018, 01:24 AM
Post: #3
RE: 2002 Buick Century Custom 3.1L Fuel Leak
The fuel line pipe, with the round diaphragm, had an o-ring that fell onto the ground under the car.

I finally found it and put it back on, then changed the injector o-rings with ones I bought off Amazon, which were slightly thicker than stock.

This fixed the fuel leak.


Thanks.
Nadeem
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01-22-2018, 06:16 AM
Post: #4
RE: 2002 Buick Century Custom 3.1L Fuel Leak
Thanks for taking the time to post the "fix." Hearing the end of the story is our only "Pay" for our advice. Very few people actually take the time to let us know how the story played out. This may also help someone else with a similar problem. Glad to hear that you figured it out and got it fixed! Stop by any time you have a question that we may be able to help with.

Thanks for using the forum,
Garner

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