Question about 1999 Buick LeSabre
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Posted on Jan 02, 2017
try to clean up your gas tank .it also can be a bad Oxygen sensor Fuel filter not so expansive around 30 40 bucks and might save you the hassle.... by it being the cause.
Posted on Jun 26, 2008
remove the rear seat cushion ,remove the fuel pump access cover ,start the engine and wait for engine to stall ,then turn the ignition off , the fuel system is now depressurized.
Posted on Jan 25, 2009
look for the fuel rail, it should be the chrome pipe that runs between all of the injectors, there should be a plastic cap that you can unscrew and under it should be the pressure check port, it looks like a regular tire valve, with the ignition key OFF push the valve in and the fuel pressure will be released, fuel will also be released so be sure you have a rag handy, and don't look into the valve when you push it
Posted on Mar 20, 2009
Locate your fuel pump fuse in the under-hood electrical center. Start the van ( cold engine ) and remove the fuse. When the engine stalls, the fuel pressure will have been depleted in the rail. You will have a small amount of residual fuel in the line but no pressure. Place a rag under the regulator to catch the dripping fuel.
Posted on Mar 22, 2009
Remove the fuel pump relay and disconnect the battery first.
Loosen the hose clamp on the fuel rail a little at a time very carefully, and put a rag over the area if you can, to avoid a squirt of fuel in the eyes.
Wiggle the hose with care and both hands free and the rag over the whole lot to dump the pressure.
There is not much volume there, just a lot of pressure.
Be very careful about clearing the area of any ignition sources and wearing some goggles or a face shield can be a very smart move.
Posted on Oct 15, 2009
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Locate the fuel pump relay in the engine compartment fuse block at location K4/C-1051. Remove the fuel pump relay. Start the engine and allow it to idle until it stalls. Crank the engine for 5 seconds to ensure fuel supply manifold pressure is released. When vehicle service is complete, reinstall the fuel pump relay and turn the ignition on to pressurize the fuel system. Start the vehicle and check the system for leaks.
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