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Top 2GNT Technical Turbo/Nitrous Tech topic #109120
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Subject: "Depressurize fuel to open SFMU" Previous topic | Next topic
JJan-12-12 10:18 AM
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#109120, "Depressurize fuel to open SFMU"


          


Forgive my memory, but do I need to depressurize my fuel system to replace the ring/disc/spring in the SFMU? I want to say I can just pop the top and do whatever... but I'm trying to avoid a big mess of flamable liquid as well.

1.) No need, open away!
2.) Just pop the gas tank cap!
3.) Unplug fuel pump under rear seat and start car!

- J

  

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Replies to this topic
RE: Depressurize fuel to open SFMU, Fallen4ng31, Jan-12-12 11:35 AM, #1
RE: Depressurize fuel to open SFMU, J, Jan-12-12 12:54 PM, #2
      RE: Depressurize fuel to open SFMU, AdministratorCODE4, Jan-12-12 01:15 PM, #3
           RE: Depressurize fuel to open SFMU, J, Jan-12-12 01:41 PM, #4
           RE: Depressurize fuel to open SFMU, Dstach, Jan-13-12 12:57 AM, #5
                RE: Depressurize fuel to open SFMU, AdministratorStar Turbo Talon, Feb-05-12 04:02 AM, #6

Fallen4ng31Jan-12-12 11:35 AM
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#109121, "RE: Depressurize fuel to open SFMU"
In response to Reply # 0




          

It's best practice to de-pressurize the line anytime you'll be working with the fuel system.

1998 Eclipse RS-T - Totaled 4/23/09 -
1998 Eclipse GST - Stroked 2.3l, HX40 fed: Build in progress
2010 Subaru Outback Limited

I hate hipsters.

  

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JJan-12-12 12:54 PM
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#109122, "RE: Depressurize fuel to open SFMU"
In response to Reply # 1


          

Originally posted by Fallen4ng31
It's best practice to de-pressurize the line anytime you'll be working with the fuel system.


While I agree that it's best practice, I just bought a new hardware support kit from Vortech (essentially new discs/rings/spring) and wanted to start tinkering again... preferrably each morning try a new combo on the way to work, and was trying/hoping to minimize the effort involved each morning.

Anyone know if either option 1 or 2 would be alright?
- J

  

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AdministratorCODE4Jan-12-12 01:15 PM
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#109123, "RE: Depressurize fuel to open SFMU"
In response to Reply # 2




          

I would suggest depressurizing too.

But I do not see the need for getting under the rear seat for option 3, just unplug the fuel pump relay and crank the motor.

If you are doing this work every morning after the car has sat through the night, there should not be any residual pressure left in the line though.

---

2012 2500HD LML


  

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JJan-12-12 01:41 PM
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#109125, "RE: Depressurize fuel to open SFMU"
In response to Reply # 3
Jan-12-12 01:45 PM by J

          

HMmmmm, didn't think about that... I don't have to be at work till 10a, but I don't get off till after 6p (so it'll be too dark to mess around). This will make my life easier, thanks!

As an afterthought (if my tinkering persists), I may just wire a kill switch in the center console

::updated::
lol, just noticed this thread must be for Floridians by Floridians

- J

  

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DstachJan-13-12 12:57 AM
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#109128, "RE: Depressurize fuel to open SFMU"
In response to Reply # 3


          

Originally posted by CODE4
If you are doing this work every morning after the car has sat through the night, there should not be any residual pressure left in the line though.

+1

-----
99 Eclipse gs (Daily)
89 Honda Crx (Drag car project)

  

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AdministratorStar Turbo TalonFeb-05-12 04:02 AM
Member since Oct 21st 2003
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#109151, "RE: Depressurize fuel to open SFMU"
In response to Reply # 5




          

You must depressurize the system. The plunger in the lower body can come flying out as well as fuel if you dont.

  

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