I've got a problem with my '78 FJ40. Here recently it has begun to stink horribly. I come home from taking a spin and I stink like exhaust, and no the top and doors aren't even on!! I don't think that it is leaking from the header or the rest of the exhaust as I just replaced it from the header back about 3 months ago. Would it be possible to have this problem if the choke was stuck or it was running too rich? At what point does the carb need to be rebuilt? Most times I don't even need to use the choke when starting it. When I fire it up it has a tendency to blow black watery, sooty crap out of the exhaust and all over whatever it is sitting next to. Any ideas what this might be? It is making it very unpleasant to drive and it is going to be parked until I find out what the problem is? I need some guidance here!! ??? Thanks!!