Smell of gas

Not everyday but often there is a smell of gas in the car. I had my girlfriend sit in the car and step on the gas pedal while i looked under the car and i didn't see anything leaking. Does anyone have any idea where the smell of gas is coming from.

O2 Senser?

Changed 02 sensor in the front, still smell the gas sometimes. I was thinking fuel pressure regulator ?

did you remove the catlyter converter

[No, could that be the cause of the smell ?

I started having the same fuel smell problem last week. It does not always have the smell. I did notice the other day that the top of the Fuel Pressure regulator was discolored in one area. Could not find a fuel leak. Park in garage and put cardboard under car to see if leaks on floor. Nothing. How hard is it to replace the regulator?

(pskats) i don't know how hard it is to replace. i post another question asking how hard it was to replace and i didn't get any answers. if you find out please let me know. Thank You

I started having the same fuel smell problem last week. It does not always have the smell. I did notice the other day that the top of the Fuel Pressure regulator was discolored in one area. Could not find a fuel leak. Park in garage and put cardboard under car to see if leaks on floor. Nothing. How hard is it to replace the regulator?

Chiltons says the upper intake manifold has to be removed to change the regulator, but looking at it it seems like it'd be easy to just unbolt and replace with a new one without taking the manifold off. Does anyone know if it can be done this way without taking the manifold off?