Check to make sure the alternator isn't hitting the muffler bracket. As the blades spin around they can flex a bit with centrifical force. -Robert vin 6585 --- In dmcnews@xxxx, delorean502@xxxx wrote: > When I accelarate and my RPMs get around 2500 to 3500, my engine > sounds like a tin can with rocks in it. I don't notice any > performace difference, but the sound makes me not want to rev up very > high. Any ideas before I start to poke and prod around? > > Erik