After shutdown I'm getting a buzzing or dieseling noise from the rear of the car. The buzz or dieseling sound will only last for 2 or 3 seconds then quit. It happens maybe 25-50% of the time I wait around to hear it.

First suspect in my mind is the fuel pump relay. Strange thing is it only happens 60-120 seconds *after* I've turned off the car. Previous relay problems (with my old 200SX) occurred immediately after shutdown, not 1-2 minutes later. Haven't had any problems with hard starts or battery drain.

Anyone have any ideas or previous experience? Innocuous or something that should be checked out?

keith
93 SE 5-speed, 122K