I have a 1989 V6 throttle body auto trans. 2WD. while driveing engine spitters sputters and then stalls out. sometimes starts right up sometimes must sit. Have put new, fuelpump,filter,plugs,cap,rotor

Possible bad throttle position sensor.

Check your TPS throttle position sensor center wire and ground should be around 1 volt with fully closed throttle and as you move throttle it should steadily climb to 4.5-5volts at full open throttle. If showing anything other than this it is bad and will cause too rich or to lean issues causing engine to stall.

I have 1989 that want crank up or less I put gas in to the throttle body I have already change fuel pump and fuel line