Engine Noise

["Woolston Craig" <cwoolsto@ladc.lockheed.com>]

Lately the '71 FI, auto, everything stock Fastback as developed a rattling noise at idle.  This noise increases with engine rpm until 
about 1200 rpm's then disappears.  Only occurs at idle and during that small time when accelerating through 1200.  Does not occur 
when running at a constant speed, regardless of rpm.  Only when at a stop or starting from a stop.  Also after the vehicle warms up the 
oil light flickers slightly.  The oil level is correct and the engine appears to be fine otherwise.  Any guesses or suggestions?  Thanks in 
advance.
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Craig Woolston
'70 Sqback and '71 Fastback (who is producing more noises then a baby with a rattle)
cwoolsto@ladc.lockheed.com