i bought a 89 ford f150 awhile ago cause i just loved that year untill this problem i havent been able to figure out with the engin idle my fuel pressure is 30 lbs when i rev the eingin up it drop down to around 10-12 ibs. i change the fuel pumps filter and everything else i drive down the road and go to press on the gas and it cuts out jumps sputer and the whole nine yards untill i back off the gas dose any one have any ideas. its the 5.8 litter automatic and of course 4 wheel drive

 

You changed the filter & the pumps? If so which pumps? Would you like to borrow some commas & periods? I think I may even have a question mark & an exclamation mark I'm not using! You're on your own as far as grammar. "Hacker! I think my ears are bleeding again!"<Side Joke-<

 

I changed the intank pumps, also i changed the pump on the fram, and the filter, and the fuel pressure reglator. none of it has seemed to help. i hooked it up to the scanner and no codes. it ideals fine and drives fine untill you really hit the gas. It jerks sputters and acts like there no gas when you hit higher rpms. Around 2200 to 2300 rpms so i am clueless.

 

Did you check the dual function reservoir? Single function reservior for single tank trucks.