92 Nissan Sentra XE. Performance Issue

[treyno11]

Hello all,

I'm having trouble diagnosing a performance issue on my 1992 Nissan Sentra XE (Japanese Built). Recently, my car's speedometer will be reading a speed up to 10mph higher than it most likely is going.. It seems also that my engine doesn't have as much power behind it.. Engine sound normal, and transmission is still fine. I have noticed the smell of gas while driving and after I've driven it.. This is on and off but seems to be getting more frequent. I tested the fuel regulator to see if fuel was going into the vacuum hose.. ran it for about 4min and I didn't see any fuel. At this point I'm sorta at a loss. Any help would be great.