Why is my gas tank not pressurizing and I'm smelling gas fumes? on 1999 Lexus GS300

I changed my fuel tank , filter and fuel pump seal and I stop have the same issue. I also only 240miles on a full tank. It guzzles gas like crazy, and smelling strong gas fumes come from the rear passenger side of my car. I don't have a check engine light cause the car passed emissions with flying colors. My I boughtthe fuel cap from the dealer and it's the same problem. The tank just won't pressurize!! What should I do? I really need some help.

by in Stone Mountain, GA on February 27, 2013
2 answers 3 comments
ANSWER by on February 28, 2013
Check your vapor recovery system. Start with the filler neck (these have a tendency to rust out) and filler hose for cracks and wear. Check all hoses in system. Or, go to a shop equipped with "smoke test" equipment to find this apparently large system leak.
COMMENT by on February 28, 2013
Had all of that done already too, and came up short. Could it be a bad fuel pressure regulator?
ANSWER by on February 28, 2013
have codes scanned and post so we can adv
COMMENT by on February 28, 2013
Had codes pulled and nothing came up. I even realized yesterday that it had a lil trouble starting. Could it be my fuel pressure regulator?
COMMENT by on February 28, 2013
Need fuel pressure test to be sure, but it could be the regulator.