What could be wrong if you smell pure gas? on 1999 Lexus ES300

Cant take your foot off the gas (doesnt do it all the time)

2 answers
Check engine light on?
Its possible you have a leak in your line somewhere. Need to be fixed ASAP. This could be a dangerous condition. If possible, look under vehicle and see if you smell gas and see any damp areas or dripping along fuel line.