1999 Hyundai Sonata • 6 cylinder FWD Automatic • 150,000 miles

I have a 99 hyundai sonata that sometimes will stall while driving but will start right up again. Except for the other day it stalled and would not fire at all. Got it towed home and tried to start later that day and it fired right up let it run for awhile but didn't smell like it was running clean. Any ideas what might have caused this? Thanks
January 16, 2011.

First, any check engine light? If so, scan computer and send me the codes. Also, when was the last tune up? Fuel filter?

Ernest Clark
Feb 23, 2011.