I've noticed recently that right after I fill up my car and drive it, the smell of gas is fairly pronounced. After driving today, I checked the fuel cap, and noticed a small bit of spillage down the side of the car.

What could be causing this? The fuel cap was on tight. I've only noticed this when I fill up all the way, as opposed to putting like 10 gallons in.

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1994 Black Firebird 3.4L
Mods include:"Ghetto Master" K&N FIPK, Crane 8MM Plug Wires and Accel Coil Packs, ASP Underdrive Pulleys, SLP Take-off Shocks and Struts, Edelbrock Performer RPM Catback, Catco Hi-flo Cat, 1 pc. steel DS, built GM 4L60E transmission.

Founder of the Free Aqua M&M's Society

Track Times (only FIPK).
E/T: 17.209
MPH: 77.326
Proudly posted!

 

Check the rubber seal around the cap. it might be deteriorated.

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1997 Camaro Z-28
1997 Chevy K1500
1994 Mark VIII
1978 Corvette
2003 522DVX
2000 Hayabusa

 

Yeah, just buy a new cap Dave. When I first bought my car, I had that same problem: "OMG, I smell gas!" and I saw gas dripping down the side after everytime I filled up. So I bought a new gas cap, and I've been fine ever since