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engine performance on 1996 Chevrolet Express 1500

Rookie cbe0621eac06868b3efe0d8d1d3611e23c60d3114864ea2ec19a68cfbd3eebab
recently the van has experienced a total loss of power when accelerating. diagnostic codes p1133 and p1153 and p0151 were found. i replaced both upstream o2 sensors and the maf sensor. no good. found a vacuum leak in the upper plenum and regasketed that. nada. van hard start now and as soon as you touch the accelerator it bogs down and tries to stall out. i do have a high pitched whine coming from my fuel pump and when the van shuts off a sound like the fuel is surging back to the tank. could my fuel pump be causing the hard start and lack of power?
(2) Answers
absolutely.
you need to get it checked asap before it fails totally. a simple test will confirm.
make sure you change the filter too.

roy
usually when the pump wines its due for a change