camp_kill_yourself

OK here is the deal i have a b18c1 it has maby 90k give or take. i have for a while now been smelling a strange odor in the cabin of the car..like exhaust fumes but i just had a full exhaust with test pipe put on and i have verified that there are no leaks. now, i just had the car dynoed with hon-data s300 and while on the dyno at the first pass it ran mid to high 140hp/with the cat still on. the guy doing the dyno said he didn't think the motor was very healthy due to the low numbers then after a couple more runs we got to 164 hp with out the cat he said that i may be burning oil and i may have problems internally. when i drive the speed limit nothing crazy, i still get the smell every now and then and when i get on it, a good size cloud of smoke comes out and makes the smell really strong.... does this sound normal? mods on car when dynoed full exhaust skunk2 I'm, aem intake. he suggested a complete rebuild i don't know and I'm going insane thinking that m engine is almost a goner.