about 4 weeks ago i went to go to work in the morning and my truck wouldnt start. so i figure the fuel pump. so i get a fuel pump install it. truck doesnt want to start right away but after a couple of rought starts it runs good. now there has been a couple of times over the last four weeks where it doesnt want to start or runs rought for a little bit but then runs fine. well today it starts but will stall when given throttle. and my actual FRP is around 20. so is my pump out again or is it the driver modual?