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#1
11-09-2006, 12:42 PM
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Excessive air pressure when removing 1992 Lumina gas cap
Does anyone know what causes this? You can hear a surge of air each time the gas cap is removed
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#2
11-13-2006, 01:14 PM
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Re: Excessive air pressure when removing 1992 Lumina gas cap
did you let the tank go REALLY low? If you haven't filled up in a while, I think the pressure has just built up and it has to go somewhere.
__________________
 This ain't your grandma's car!!
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#3
11-15-2006, 12:11 PM
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Re: Excessive air pressure when removing 1992 Lumina gas cap
is it pressure or vacuum that you are hearing hiss out? I know that OBDII uses sort of a map sensor and manifold vacuum to monitor the integrity of the fuel system aginst venting fuel favor. OBD1 does not though (that i am aware of). May just be somethnig you have to get used to.
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#4
05-02-2007, 02:18 PM
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Re: Excessive air pressure when removing 1992 Lumina gas cap
Quote:
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