1987 chevy S10 TBI stalls out when I turn it on
My 1987 chevy s10 turns on for about 15 to 20 seconds but then dies out.. turns right back on but it does the same thing ever time...I have changed the fuel filter, M.A.P sensor, spark plugs, plug wires, coil, air idle control valve, battery is new what can be causing this to happen I here the fuel pump running and I see fuel coming from the TBI please help