sounds like oil could be coming from your sons oil pan or oil filter and dripping on the exhaust, hence the smoke.
Man, I miss AMC . . . I've been looking for an AMX for years -even the '79-81bluestinger said:My son just bought an '86 LX Hatchback with the 3.8. It has a little over 105,000 miles on it. The car apparently sat for several months before we bought it. On the way home, we noticed white smoke coming from underneath and it smelled like burning oil. When we arrived home, I saw that there was a fairly steady drip of oil coming from somewhere. I'm not a Ford guy (don't hold this against me but I'm an AMC fanatic) so I don't know anything about Ford V6's. First, is the 3.8 a reliable engine? Where are the most likely places for an oil leak? Is there anything else I should know? Is there anyone on this forum from Las Vegas? Thanks for any help.
Boulder City, NV