Exhaust fumes coming into interior

I have a 92 wrangler with 90000 miles. Can't find a hole in the exhaust system, no idea where the fumes are coming from. Happens driving and at an idle. Any help is appreciated

Check around your exhaust manifold/header. This is where jeeps seem to leak the stuff the most. Exhaust also shouldn't get into your interior unless you have some holes in your floorpans. Do you have anything other than the drainhole plugs removed down there? Thats really all i can think of, check where your exhaust joins together as well, as I just replaced mine on my TJ 2.5L with a Flowmaster Series 40 and new cat and before doing so really noticed all of the carbon on the outside of my exhaust even before the exit. Just a thought.

dude if you do much offroading you should check where your hedders meat your exost pipes. might check that your motor mounts are still in good shape while your down there.