HELP.... i have a 1991 f150 with the inline 6 (4.9)and it stalls when you accelarate it all the way and itll die also when you start it it cranks alot more than usall before it starts and sometimes dies at that point to ive changed TPS AND MAPO SENSORS and all plugs and wires and rotor bug and fuel and air filter ECT. i cant figure this out any help would be greatfull its my only transportation and need it fixed its 5 speed btw. anyone no a solution??????

 

Do you still have the cats on there?

If it will idle, check the vacuum at idle. If there isn't any then you have a restriction.

Thats where I'd start.