Releiving fuel pressure

Releiving fuel pressure

Postby slim724 [OP] » September 11th 2010, 4:12am

Going to replace my fuel filter and wanted to releive any excess pressure. On other vehicles I have pulled the fuel pump fuse then started it and let it run til it dies, just wondering if there is anything wrong with doing this on the van?
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Re: Releiving fuel pressure

Postby unrreal » September 11th 2010, 5:43am

all you need to do is open the fuel cap and the pressure would be released from the system.
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Re: Releiving fuel pressure

Postby astroturf » September 11th 2010, 6:24am

unrreal wrote:all you need to do is open the fuel cap and the pressure would be released from the system.


Good Post...

That's just what I have done on the last two fuel filter changes.

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Re: Releiving fuel pressure

Postby RECox286 » September 11th 2010, 1:05pm

Sorry to tell you that the fuel pump has a check valve. Opening the fuel filler will relieve the tank pressure, but not the rail pressure. There is a Schrader valve on the fuel rail which will relieve system pressure which includes the fuel filter. When I replace the fuel filter, and if the dog house is still in place, I opt to crack one connection at the
filter with me out of the line of fire, while holding a large rag in the line of fire to catch the squirt which I know is coming. No, it's not the best method, but it's how my mother did it, and it works for me.

Running the engine with the pump fuse de-fused, will work only to a degree, and no it won't hurt the engine, what it does do is to emulate an inoperative fuel pump, period. So, if this works for you, then, do it. However, I would be out of the line of fire, and ready with a rag, just in case...

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Re: Releiving fuel pressure

Postby Leeann_93 » September 11th 2010, 4:43pm

slim724 wrote:Going to replace my fuel filter and wanted to releive any excess pressure. On other vehicles I have pulled the fuel pump fuse then started it and let it run til it dies, just wondering if there is anything wrong with doing this on the van?



Not a thing - that's the procedure in the FSM for changing the filter. Oh, wait - you said fuse. Procedure in the book is to remove the fuel pump relay, not fuse.
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Re: Releiving fuel pressure

Postby slim724 [OP] » September 11th 2010, 8:36pm

Awesome guys, thanks for all the input, guess I'll just pull the relay, fuse, gas cap and use a rag at the fittings
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