2003 Chevy Malibu LS 3.1 V6 110,000 miles. I just replaced the fuel regulator because gas was coming out of it. Now very rough idle feels like it will stall. Sorta revs up and down on its own. It didn't have any of the common symptoms of a bad regulator except for the very strong odor. I noticed the regulator leaking when I replaced the water pump. Also I'm not to sure what the throttle body or the housing should look like but they were filthy. The housing had a bunch of built up gunk on the bottom of it. I did wipe it down and got the build up off to find a small hole in center, hopefully that was the right thing to do? Any input will be much appreciated.