No codes? This happened to me (no codes). Ended up being o2 sensors loose and worn spark plugs (did both at the same time). I'd start by pulling the spark plugs and checking how worn...I'd also look at how tight the exhaust bolts and o2 bungs are.I was out today in my 2001 Esprit, and when I got on it, I could smell fuel. Just cruising it seemed OK. Does that give anyone a hint as to where the leak is coming from?