1985 740 DL wagon 2.3 200k milesruns great then just stalls. At any temp warm or cold. At idle or driving slow or fast with foot on gas or not. pull over turn key engine cranks but will not start. Wait 1 or 2 min. starts right up and runs fine. Already put in new battery spark plugs wires cap and rotor. Alsoreplaced a 2" vac line that wasleaking.didn't help.Tried to turn up idle but the idle speed **** does nothing. My (Haynes book says to diagnose this problem with the air control valve and/or circuit?)anyone know how to do this or shall i just put a bullet in her?an go back to chevys