At 12:30 PM 7/7/2002 -0500, you wrote: >pressure builds up in the gas tank and gas is being forced through the >small black cylinder, sorry forget what it's called, located inside and My NX was making horrid groaning noises, and when I'd crack the gas cap it made creaking noises like the whole gas tank was expanding or contracting. A new gas cap fixed it. ($5 at Advance Auto, Nissan wants $20) -WC