OK I kknow you techs out there hate questions like these, (because they sound so stupid!) but I wonder aobut my new 05 D/A when throwin the hammer down, up to about 22-2400 RPM sounds fine, then a secondary burst of that signature diesel clatter goes off, pretty loud compared to regualar driving. antone familiar with this? thanks

It's the pilot injection shutting off.

thanks for the response Hound... do you know why it gets louder rather than quieter>