I have a 1993 Grand Prix. when I take the gas cap off my car to fill up the tank there would be a hissing sound like the tank was pressurized but now when I take off the cap it doesn't make that sound anymore. I also had to replaced all the lines for my charcoal canister a couple of months ago because they dried out and leaking gas vapor and I smelled gas but now I don't smell gas anymore so I wanted to know what it could be i haven't noticed any changes in fuel mileage I still get about 320 miles on a tank so what do you think it could be.
I couldn't have swiched them the lines are differnet sizes.
The Fuel tank Cap was designed to hold 10 P.S.I. you can get it tested to see if the check valve is still working. But you must make sure you put the lines back where they belong on the charcoal canister you may have switched them.
BMW OEM E36 CANISTER GAS FUEL CHARCOAL VAPOR SHUT OFF VALVE PUMP TANK BOX MODULE, 2001-2004 MAZDA TRIBUTE V6 FUEL GAS VAPOR CANISTER EMISSION SYSTEM CHARCOAL BOX, 1998-2000 VOLVO S70 NON-TURBO EMISSION SYSTEM FUEL VAPOR CANISTER CHARCOAL BOX, 05 06 SAAB 9-2X CHARCOAL CAN FUEL VAPOR CANISTER VAPO EVAPORATOR 2.0L 2.5L OEM , FUEL EVAP VAPOR CHARCOAL CANISTER Land Range Rover P38 1995 95 96 97 98 , lincoln mark viii 1997-1998 emission fuel vapor charcoal canister &TRAY OEM, 93 Honda Prelude SI OEM Fuel Vapor Canister Charcoal Emissions Bottle , Ford Lincoln Continental 1998-2002 Charcoal Canister Emissions Fuel Vapor OEM, 94 95 ACURA INTEGRA CHARCOAL FUEL GAS VAPOR CANISTER CAN OEM , GENUINE___99-2011___Vapor_Canister_Fuel_Filter_M_A_ZDA_2_3_5_6__626_CX-7_Protege, 01 2001 AUDI A6 C5 2.7 T - FUEL VAPOR CHARCOAL CANISTER, 00-06 MERCEDES S430 S500 S-CLASS W220 CHARCOAL CANISTER FUEL VAPOR 2204700159, FUEL VAPOR EVAP CHARCOAL CANISTER Volvo XC70 V70 S60 2001 01 02 03 04 05 06 07 , BMW/Hyundai/Jaguar Fuel Tank Vapor Canister Purge Valve/Solenoid 0 280 142 150, 1993-1997 INFINITI J30 EMISSION SYSTEM FUEL GAS VAPOR CANISTER CHARCOAL BOX, CHARCOAL FUEL CANNISTER vapor Mopar NOS 4241837 1984-85, 1995-1996 LEXUS LS400 EMISSION SYSTEM CHARCOAL BOX FUEL VAPOR CANISTER , 98 99 00 01 ACURA INTEGRA CHARCOAL CANISTER EMISSIONS FUEL VAPOR OEM, 2005 NISSAN MAXIMA FUEL VAPOR CANISTER CHARCOAL BOX EMISSION SYSTEM GAS CANISTOR, FUEL EVAP VAPOR CHARCOAL CANISTER Audi TT 2000 00 , 2004-2007 KIA SPORTAGE CHARCOAL CANISTER FUEL VAPOR OEM TESTED, 1997-1998 LEXUS ES300 CHARCOAL BOX FUEL GAS VAPOR CANISTOR CANISTER EMISSION, 2002 Ford Focus Fuel Vapor Charcoal Evap Canister, VOLVO V40 S40 00 2000 1.9 TURBO FUEL EVAP VAPOR CHARCOAL CANISTER EMISSIONS, 1998-2004 CADILLAC SEVILLE 4.6L EMISSION FUEL VAPOR CANISTOR CHARCOAL BOX GAS, 00 W220 MERCEDES S500 FUEL EVAP VAPOR CHARCOAL CANISTER 220 470 03 59 2204700359, FUEL EVAP VAPOR CHARCOAL CANISTER Audi Allroad A6 98 99 00 01 02 03 04 05 , 99-02 MERCURY COUGAR V6 EMISSION CHARCOAL BOX FUEL VAPOR CANISTER BRACKET TRAY, 2001 2002 MAZDA MILLENIA 2.3L EMISSION SYSTEM CHARCOAL BOX FUEL VAPOR CANISTER, 2006 2007 2008 2009 SCION TC EMISSION FUEL GAS VAPOR CANISTER CHARCOAL CANISTOR, 2005 2006 2007 2008 2009 2010 SCION TC FUEL VAPOR CANISTER CHARCOAL CANISTOR GAS, 2002 JAGUAR X TYPE XTYPE FUEL VAPOR CANISTER CANISTOR CHARCOAL EMISSION BOX, 01 Jaguar S Type FUEL EVAPORATOR CHARCOAL VAPOR CANISTER XW4U9E857AB, 90 Acura Integra Charcoal Vapor Canister Emmisions Fuel GOOD , OEM 01 2001 02 2002 03 2003 04 2004 05 TOYOTA RAV4 FUEL VAPOR CHARCOAL CANISTER, Honda Civic LX 2008 1.8L Gas Tank Fuel Vapor Evaporator Charcoal Canister 08 09, LAND ROVER P38/P38A EVAP SMOG FUEL VAPOR CHARCOAL BOX CANISTER PURGE SOLENOID, 94 Honda Civic Fuel Vapor Charcoal Canister Container, FUEL VAPOR EVAP CHARCOAL CANISTER Jaguar XJ8 VDP XJ6 XJS XK8 95 96 97 98 99-06, 93 94 95 96 97 CHEVY CAMARO FUEL GAS VAPOR CHARCOAL CANISTER OEM , 1993 1994 LEXUS LS400 FUEL GAS VAPOR CANISTER CHARCOAL BOX EMISSION CANISTOR, 1995 TOYOTA TRUCK 4 RUNNER FUEL VAPOR CHARCOAL CANISTER TESTED & GUARANTEED, 97 98 99 00 01 02 PORSCHE BOXSTER OEM CHARCOAL FUEL VAPOR CANISTER 986, 1999-2005 SAAB 9-5 95 FUEL TANK MOUNTED VAPOR CANISTER EMISSION BOX CHARCOAL, FUEL EVAP VAPOR CHARCOAL CANISTER Mercedes 01-06 W215 W220 S430 S500 S55 CL500 , 1994-1995 Acura Integra fuel gas vapor charcoal canister , 06 07 08 09 10 11 Honda Civic Si Vapor Canister Charcoal Fuel Lines ONLY OEM , Jaguar XK8 97-99 OEM Pair Charcoal Fuel Vapor Canister / Purge + Pressure Valves, 01 2001 VOLVO V40 1.9T CHARCOAL FUEL VAPOR EVAP EMISSIONS CANISTER, 1997 Mitsubishi Diamante Fuel Vapor Canister OEM Charcoal Gas Container,