'Nuther one for the Z gurus to chew on. I've owned 2 240's (ironically 72's) and 2 280's (both 77's..huh). All of them have had a nasty habit of gassing the occupants with exhaust fumes during decceleration. Perhaps mixture is an issue, but I would like to keep the fumes out period, regardless of the oxegen content in it. The hatch seal is good on my latest 280, the fact that it only does it coasting in gear makes me wonder. Hmm. Personally, I've grown to associate that smell with Zcar's in general (to whit, I love it!), but my girlfriend whines, everytime I drive her around in it, that we're riding in a gas chamber... Any tips/suggestions ya'll?