[V8] 2 things

[Scott Simmons]

Two odd things have occurred, curious as to their nature:

1) On occasion, after turning the ignition off, the oil pressure needle 
will hesitate, before moving over to the 5 and pegging there.  Turning 
on the ignition will bring it back to zero, where it shall stay after 
turning off again.  It does this randomly.  Next time the car's in the 
air I'll clean the pressure sensor terminals to ensure a good 
connection.  Gauge works perfectly during operation, I just think it 
might get confused when I turn off the car?  I don't want a pegged 
needle to draw current and drain the battery -- I know it's a resistance 
system, but what side-effects are there?

2) On occasion, when the radio's off, I can hear a turbo spooling under 
my hood.  A whistle sounds is faintly heard as the engine passes 2500.  
It sounds like it's coming from the center or passenger dash or, 
possibly, the engine compartment.  It follow rpm and not vehicle speed.  
Vacuum leak somewhere?  It's a very, very faint whistle and I only 
noticed it recently as I turned off the radio one night and haven't put 
it to any scientific testing (trying to get it to repeat on cold engine, 
hot engine, engine loads, etc).

Not very big problems, just didn't know if anyone else has run into this 
before.

~Scott Simmons