You were talking about a puff of WHITE smoke? White can mean head gasket dying slow death. Something to keep in mind- As other guy said Locks going up and down is Master switch in drivers door dying. You can find them and the rear latch set-up in Junk yards- getting one from dealer is EXpensive. Check out the Montero I just recently picked up- In other post.

1990 Black Monty LS Over 300K' 1993 Isuzu Rodeo LS 4x4 46k (yes only 46K!)1989 Honda Transalp 600 Africa twin,