Just wondering if there any common areas to check for this sort of thing, it's an '87 FJ60. The exhaust system itself appears to be sound from the tail pipe to the engine. I've had the thing for a year and the exhaust smell was there to begin with, it seems to have gotten worse. Recently a gas smell has been added in with the exhaust smell. You can smell these from 5 feet away from the engine. It seems they are coming from under the hood. Any information would be great. Thanks.