90 vette with acceration problem

The car starts fine, I drive it for 30 mins, then starts acting up. When I press the gas the car bogs down and stalls. It is fine when idling but when the gas is press the issue happens. I have had the car in about a month before this happened and the Chip and computer were replaced. Any help would be great.

Gauge the fuel pressure, it should have around 40psi. Unplug the vacuum line from the regulator and see if the pressure rises.
The small fuel filters that Chevy designed tend to clog up really easily. Remove the filter, plug both ends w/a finger and shake it up. Pour the gas out of the inlet and see if it comes out clean or dirty. Next, wipe the inlet fitting clean and try to blow through it. If it's hard to blow through, replace it, or replace it anyway.