Chevy Astro

How do you discharge pressure from the fuel system before replacing the fuel filter in a 2000 Chevy Astro vans?

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2010-08-21 22:30:41
2010-08-21 22:30:41

I remove the fuel pump fuse or relay while the engine is running. The engine will run until the pressure has dropped. Leave the fuse or relay out until you have finished replacing the fuel filter.

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No, you do not have to and in some cases you cannot. Unless your car has a fuel rail pressure relief valve, you can only be prepared for the spray of fuel when you disconnect the filter.


it isn't necessary to relieve any pressure prior to replacing the fuel filter on the 2005 Impala, however be mindfull of the gas tha is in the lines and in the filter when it comes off


A lot of pressure before the filter indicates that the filter is dirty and water has more difficulty making its way through. clean the filter and the pressure wil reduce.


The Maytag refrigerator water filter needs replacing approximately every 6 months. It can last up to a year before wearing it out but for best results change it before then.


Right next to the oil filter, it kinda gets in your way when you are replacing the filter.


Low pressure on the pressure guage before the filter indicates that the filter is clean. That is assuming that the filter is not damaged and letting water through unfiltered. As the filter collects more dirt it becomes harder for the water to pass through the filter and the pressure increases. When it gets too high you need to clean or backwash the filter.


The filter is one specially made and designed for this vehicle. You will have to have it ordered in before replacing.


Usually the pressure gauge on your pool equipment indicates how much pressure there is before the filter. as the pressure goes up it indicates that the filter is getting blocked and needs a backwash or cleaning. while the pressure is low the filter does not need cleaning.


Should be the same as my 1989 323; 40 PSIG (280 kPag). Please note this is on the discharge side of the high pressure pump, before the fuel filter. Good luck Malcolm


Release the fuel pressure by opening the gas cap first, than pull the fuse for the fuel pump. Start the car, it will sputter and die from lack of fuel pressure...now safe to change out the fuel filter. I'm not a safety freak...but let me advise wearing safety googles.


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remove gas cap Removing the gas cap will not relieve any pressure between the fuel pump and the engine.


If the vehicle is not running, then the fuel line is not under pressure and replacing the filter is very easy.There will be some fuel spillage from the old filter, so be prepared to catch it and wear eye protection just for good measure.


To get the 2009 NPR started after replacing the fuel filter, simply start the engine.


try replacing the delta pressure feedback sensor. this fixed my explorer.Or you can try replacing the relay.


Need to run a fuel pressure test on the fuel pump FIRST.COULD BE FUEL FILTER.Need to do this first before you waste any money on replacing parts.


You use a sediment filter before the pressure tank.



The place to start is by replacing the fuel filter and check fuel pump pressure.


Low oil pressure. Now the question is does it really have low oil pressure or is this a false reading. Check the oil level and add as necessary. If it was low that is your problem. If not, You need to check the oil pressure sending unit for loose wires or a leak. If you find it is OK, then you will need to see if you indeed do have low oil pressure. You can have someone run an oil pressure test or you can simply replace the oil pressure sending unit as it may be defective. I would also replace the oil filter and make sure you are using a good quality correct filter. If replacing the sending unit, checking the oil level, and replacing the filter does not correct the problem, you will need to have an oil pressure test run. If you find you have low or no pressure, the oil pump has probably failed.Low oil pressure. Now the question is does it really have low oil pressure or is this a false reading. Check the oil level and add as necessary. If it was low that is your problem. If not, You need to check the oil pressure sending unit for loose wires or a leak. If you find it is OK, then you will need to see if you indeed do have low oil pressure. You can have someone run an oil pressure test or you can simply replace the oil pressure sending unit as it may be defective. I would also replace the oil filter and make sure you are using a good quality correct filter. If replacing the sending unit, checking the oil level, and replacing the filter does not correct the problem, you will need to have an oil pressure test run. If you find you have low or no pressure, the oil pump has probably failed.



Back wash valve when the pressure before the filter becomes to high usually indicated in red on the gauge the filter needs to be back washed.


If you have a sand filter the sand needs replacing every 3 or four years. If you have a cartridge filter it wont need replacing until it breaks. Cartridge filters can become blocked over time causing the pressure to become to high as a result of the restricted flow of water, this can be fixed by getting an approved (for your filter) cleaner, this will clear the pores in the filter and keep it going so long as the membrane doesn't break.



It's located just before the oil filter.



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