1995 SSE Backfire related problems
Backfire was related to failed UIM. Replace UIM. Next problem, dies while driving,replaced fuel pressure regulator (fixed problem). Next problem, small puffs of smoke from exhaust on startup, later steady smoke, sweet oil smell. replaced vacuum moduator on transmission (fixed problem). Theory: backfire that blewup airbox also blew the diaphagms in replaced parts. Car now problem free.