Question about 2002 Oldsmobile Bravada

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2001 lds bravada replaced fuel pump scencers and fuel filters sti

Still have low fuel pressure reading code 0453,turns over alott before starting,whats the fuel pressure regulater and its purpose..

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Fuel pressure regulator

Posted on Jul 30, 2009

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Check the fuel filter and fuel pressure regulator. They are part of the same assembly and are located on top of the fuel pump. To replace the regulator # Disconnect fuel supply line at the Filter/Regulator nipple and releas locking spring tab (2 in diag.) on the regulator, then turn counterclockwise and pull out. To test regulator use a gauge like this in fuel lines:Pump Pressure Tester.
Pressure in 2003 should be 58psi (48 in 2001 engines). Pressure will drop of about ten psi when you start engine.

There is also an automatic shut down relay ASR. If problem is the ASR the pressure will go down when the relay cuts off power to pump. Read voltages and see if the problem is electrical first before going for the regulator.

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Nov 29, 2009 | 2001 Oldsmobile Bravada

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2001 f350 diesel craks but wont start


SOUND LIKE THE ELECTRIC LOW PRESSURE FUEL PUMP CHECK FUSE TO SEE IF PUMP GETTING POWER. IF NOT REPLACE FUSE AND CHECK THE WIRE TO PUMP.IF PUMP IS GETTING POWER..REPLACE FUEL FILTER FIRST.IF IT DONT HELP.COULD BE THE ELECTRIC LOW PRESSURE PUMP. FAULTY. IT PUMPS DIESEL FUEL IT INTO INJECTION PUMP TO BE PRESSURIZED TIMED AND INJECT.SEE IF LOW PRESSURE PUMP DONT WORK THE WHOLE ENGINE WONT RUN.THE INJECTION PUMP NEED FUEL FROM LOW PRESSURE ELECTRIC PUMP TO RUN ENGINE.

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Fuel problem


Check your fuel pressure at the Shredder valve, you should have 60PSI to 65PSI. If you have less then that or more then that your going to have problems with your fuel injection system. The other thing to is to check your fuel pressure regulator. Hook up the fuel pressure gauge and turn the ignition switch to the run position to activate the fuel pump. Once the pump stops pressurizing the fuel line wait and see if your losing the fuel pressure excessively. If you are then your may have a bad regulator and it's leaking internally. The other thing to is may be a bad fuel pump, The good news is the fuel pump in the sending unit in your bravada can be replaced rather then the whole unit. If it is the fuel pump, Buy a heavy duty pump to install to your sending unit. Don't have them sell you the whole unit, pump alone is around average $60.00 other then the whole unit for $230.00. Good luck and keep me posted, be glad to help

Jun 09, 2009 | 1993 Oldsmobile Bravada

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