1992 GMC K1500 runs rough when cold.

My 92 Gmc 5.7 Runs Rough At Idle And Low Rpm When Cold. Has 155,000 Miles. Have Replaced Plugs, Wires, Cap, Rotor, Egr, Control Module And Fuel Filter. Idle Surges At Start-up And Occasionally Dies. Starts Easy, Runs Ok At Rpms Above 2500 Acts Like A Carburated Engine With No Choke.

Have you Checked the Timing by any chance?