So my 2000 honda odyssey makes.loud popping noise and has.high idling and stalls when stopped and smell fuel.

Hello, it sounds like you could be having some backfiring and general engine performance problems occurring due to some kind of air intake leak, vacuum leak, emissions control issues, crankcase ventilation, or all of the above. This vehicle needs a professional evaluation. It's not going to be a difficult diagnosis for a skilled, qualified tech with proper tools and reference materials. From the computer, I can't really begin to tell you where to look first. Just too much going on there.