92 RS stalling when letting off and going under 1000 rpm,3.1 recent plugs-wires 30,000 ago,,any temp,,no codes, no CEL,,,,stumped runs fine,until slowing for traffic ,stop etc..rpm drops then dies,,,idles bad HELP

 

Fuel pump, fuel pressure regulator, and idle air control valve are the first things that come to mind. Check your fuel pressure (your local Autozone may have a gauge on loan) at the fuel rail, and see where pressure is when you first prime the pump (not start), when idling, under acceleration, and how long pressure holds after you shut the engine off. Also pull the vacuum hose off of the pressure regulator and see if any fuel comes out. If it does, the diaphragm inside is bad and you need a new regulator. Then come back with the findings.

 

I would go with the Idle air control valve (IAC).