Hey guys, new to the forum and I'm in the process of helping my son purchase a car and we just looked at an LS 400. Car is in pretty nice shape, but it has 166,000 miles on it. After reading through some posts, that doesn't concern me much. What does concern me is a taping noise at idle. It doesn't appear down low and doesn't sound like lifter noise per say either. I was wondering is it common for these things to possibly have noisy fuel injectors? It seems to go away when reving past 1500 to 2000 rpm and it can't be heard in the cabin of the car. Any ideas would be appreciated. :D