[Shotimes] Help with stalling SHO

[Steve Tatro]

My trusty old '93 let me down last night.  More than once it died as I
accelerated from a stop.  It seemed that if I eased into the pedal it
would do okay, but anything more than 1/4 throttle and it would shut
down.  Would start back up the first try, though after some extended
cranking.  Definitely didn't start like usual.

I was able to reproduce the stalling if I blipped the throttle and
then backed out immediately.

Got home, pulled codes.  KOEO 511 and 539.  I do have an LPM, and I
did have the EATC on.  KOER indicated no additional problems. 
Cylinder balance test was fine.  I removed the LPM and reset the
computer.  Reset the idle this morning and everything seemed fine,
although it's hard to test the rapid acceleration problems in the snow
;^)

Any ideas?  Most sensors on the car are less than 3 years old, except
the CKP (or CPS?) - it's original.  I've not experienced the failing
crank sensor so I'm not sure of the symptoms.  Plugs/wires should be
okay, less than 2 years (20k miles) old for both.

Thanks in advance,

Steve Tatro
Red/Black '93 with 181k miles
Monroe, Ohio