Is your 99 a V6? I have a '00 V6 that has an occasional raw gas odor. We
thought we had it traced down to the injectors, but so far, no gas
visible, only the odor/vapor. Have replaced the O rings on the injectors
hoping for a cheap fix, but no luck. seems to most often occur a few
minutes after initial start-up. let me know if you figure yours' out.