Ok I'm at my wits end with my vehicle!! It's a 1994 Oldsmobile
Eighty-Eight Royale.  Awhile back occasionally it would hesitate and
stall out (maybe Once or twice a month - mostly in the day).  Its been
progressivly worse over the last while to where it now stalls daily. I
need this car for my business, so to say the least I'm very frustrated.

- Stalls around midday. Will start fine in the morning and will run
okay until around midday - I'm assuming either because of:
 A) its warmer ouside/ engine is warmer
  and/or
 B) I've used around 1/3-1/2 tank of gas.
- ECM is throwng no codes except something to do with Tranny -  I've
yet to get the report back from the dealer on which one (something to
do with TCC???).
- It stalls in park while idling, in drive, load, no-load -  really
anytime.  It's extremely intermittant.
- Stalling usually happens after engine starts loping erradicaly
(revving, falling, revving, falling, etc). At this point there is no
power from gas whatsoever: In fact if the gas pedal is pushed in it
will cause a stall. Putting into neutral and pressing gas will
sometimes not cause the same problem (it will rev up fine).
- Restarting isn't much of a problem.  I'll pull over, put into Park or
neutral and it will start right back up (sometimes 2 cranks) and will
run for another 10 - 30 min before doing it again.
- Ive changed so far:
 *ECM
 *Crankshaft Sensor
 *Coil Packs/ Module
 *Alternator, Starter and Battery (probably dead from so many
restarts)
 *Plugs
 *Wires
 *Air Filter
 *Fuel Filter

- Like I've said, 2 dealers and another mechanic all can't find any
problems.
- Fuel Pressure is good: 32-35psi running
- Spark ok (while running fine - not sure when in "stalling mode")
- Scanned while running and driving around and while idiling - no codes
(except what I mentioned earlier).
- When it starts to hesitate and idle badly, the engine sounds like its
sucking in more air for a min or two (a loud sucking sound coming from
air housing), then (if gas isnt pushed) will slowly come back to a
"better" idle where it will start to lope and rev.
- One more thing: while being scanned, the car luckily started to act
up - the dealer said the car's readings were all out of whack. He said
it may be the ECM - So today I bought a new ECM and installed it (with
original PROM) hoping that would fix the problem - I thought it did,
until it stalled coming home.

I'm really getting really tired of this problem. Any help would be
really appreciated!!