Fuel Issue

[5150coupe]

This issue just started about two weeks ago and seems to be getting worse. It seems that i am not getting enough fuel at times. I first noticed it on my way to work in the morning. I would drive about three blocks and all of the sudden the car would bog down and start popping when i gave it throttle. After another block it would start running strong without issue. Now it I am having this issue more often, whether the engine is hot or cold. I changed the fuel pump along with the in tank and out of tank filters. I also changed the spark plugs. I thought about the tps, but i'm not sure if this could cause the issue. I did change the tps for another one i had laying around. I do have a manifold leak, so maybe that is slowly getting worse. I'm not sure at this point and would appreciate any suggestions. Thanks.