while driving engine will lose power rpm go high, when you take your foot off the accelerator and slow down it starts running fine.alsowill not start at times engine turns but will not fire.no engine codes are given.I have changed both trans sesors did not help. without a code where do i go from here.

 

check the distributor

 

distributor checks ok, engine now shuts down while driving, fuel pump is working,I replaced tps this did not help. any more ideas thanks.