Fuel and Ignition Fuel Pumps and Systems, Ignition and Spark Systems

Component Indentification

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Old Sep 8, 2020 | 09:39 PM
  #1  
1994-LT1-Eric's Avatar
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Component Indentification

Hey all,

This is under the fuel tank. What's the name of this component and its function? I found it once but can't remember now 😐






Thanks in advance,
Eric
Old Sep 8, 2020 | 10:48 PM
  #2  
Injuneer's Avatar
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Re: Component Indentification

Fuel tank pressure/vacuum vent valve.

From Shoebox

http://shbox.com/1/fuel_pump_wiring.jpg

Old Sep 9, 2020 | 08:09 AM
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1994-LT1-Eric's Avatar
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Re: Component Indentification

Originally Posted by Injuneer
Fuel tank pressure/vacuum vent valve.

From Shoebox

http://shbox.com/1/fuel_pump_wiring.jpg
I searched yesterday and couldn't find this. Thanks Injuneer.
Ima go look up what this does, and how to check if it's working. Pretty sure mine is toast, original, and pretty brittle
Old Sep 9, 2020 | 08:20 AM
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1994-LT1-Eric's Avatar
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Re: Component Indentification

Simple valve that opens at 1 psi either direction it seems.
Old Sep 13, 2020 | 11:51 AM
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Re: Component Indentification

The valve relieves tank pressure when it reaches 1 PSI. It relieves tank vacuum when the tank vacuum reaches 1 to 2" Hg. (0.5 to 1.0 PSI), per factory service manual.
Old Sep 19, 2020 | 06:53 PM
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1994-LT1-Eric's Avatar
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Re: Component Indentification

Originally Posted by Injuneer
The valve relieves tank pressure when it reaches 1 PSI. It relieves tank vacuum when the tank vacuum reaches 1 to 2" Hg. (0.5 to 1.0 PSI), per factory service manual.
Yes, found it with a better word search!


Next time I'm home I'll test it!

-Eric
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