LS - 1st and 2nd Gen (1990-2000) Discussion topics related to the 1990 - 2000 Lexus LS400

What does it mean when your gas tank makes a whoosh when you take off the cap?

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Old 03-10-09, 09:17 PM
  #16  
MeryLexmas
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Originally Posted by kosi718
okay good info to know,

so can anyone answer WHY exactly do we need to replace the cap?
When you stop hearing the "whoosh"!
Old 03-10-09, 09:26 PM
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LiCelsior
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not true..sometimes mine doesnt depressurize....but thats when its extremely low. then next fill up it'll have the sound.
Old 03-11-09, 10:16 AM
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KingNasGS4
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lol okay, i know Im asking a lotta questions, but Im a curious man...

but what happens to the gas when the cap or gasket isnt good? does the gas evaporate and escape the tank?
Old 03-11-09, 10:37 AM
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qewani1
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Originally Posted by kosi718
lol okay, i know Im asking a lotta questions, but Im a curious man...

but what happens to the gas when the cap or gasket isnt good? does the gas evaporate and escape the tank?
you will get CEL on with EVAP codes like P0440...etc.
Old 03-12-09, 07:51 AM
  #20  
MEANDAFAKA
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all i know is that its working when you hear that sound.
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