Join Date: Nov 2009
Location: Home: NorCal, School:Boston MA
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I had the same problem. Turned out the fuel tank had rusted out around the sending unit connection allowing fuel vapors to escape.
There was a TSB about this for 1st gen Xterras in the Northeast.
Not sure if you're covered under that but it might be worth taking it to the dealer and getting it checked.
I got a new fuel tank and sending unit at no cost to me due to this.
2001 Nissan Xterra V6 4X4 - SOLD
Planned but Never Executed: PML, 32s, Bumpers, Sliders, Lighting