Car starts and runs fine up to 1800 rpm then shuts down - kicks back in and idles.  Here is how problem came about and what I've done so far:
About a half dozen times in 3-4 months, usually after a rain, the car would shut off at about 4K rpm during acceleration.  Backing off throttle would cause engine to kick in and then I could drive fairly normally.  Later, again in the wet, car wouldn't go over 1800 rpm, but cleared up after a few minutes and ran normally for a couple of weeks.  Now it flat won't go over 1800 rpm; otherwise it's fine.  In checking fuel pressure, I found that vacuum hoses to FP regulator and FP damper were bad, so replaced them.  I changed the TPS, fuel filter, fuel pump, and DME relay and ran FP test.  2 months ago I changed the muffler so it's not clogged.  My thinking right now is that the failed vacuum connection to FP regulator caused high fuel pressures and high current draws which might have caused a failure of the DME.  I am wondering, though, why the car will run to 1800 rpm but not above.  Anyone have any ideas?