I had this issue the other day ,fuel related ,the return lines were all seeping fuel , one real bad ,when I got on the pedal and it almost died mid rev then nearly stalled in the middle of a main road I was on.Since I wastnt daily driving the car it was not real visible that they were bad.Replace the lines and see if it goes away.Bap geon in Houston has the lines ,order 4 ft ,runs $1.65 a ft , cut your replacement after you pulled the line off with needle nose plyers,and get all fuel filters and see if this cures your issues..