Camry 1993 2.2L Fuel problems
 

Please can any one help car started jerking like it was not getting fuel just after i had to jump start it because of a flat battery so new alternator as it was on the way out car went for a day then started again then i put a new fuel filter went for 3 or 4 days then started again so i put a new fuel pump car went for 1 week then started again car does not stall just seems like it is starving for fuel you can just push the accelerate about a quarter and it goes but a up hill dies bad drops back to about 40Ks if you push the accelerator any more then a quarter down the engine dies but does not stall have taken it to a garage they are even stumped they checked the throttle body and cleanned it put it on the computer had no error codes new coolant temp sensor went for went for 3 or 4 days again now has started again like it is starving for fuel. Some times if you push the accelerator all the way down it will start to rev but only for a little bit then it just starts again like no fuel any ideas please would be very much appreciated before i go mad every time i do some thing its costing me lots of $$$$$$$ and just can not find out what it is and can not work out why it would go for a few days or a week then stsrt it again.
Les