Fuel pump going bad?

[ShadowsFa11]

I installed a Walbro fuel pump right after my engine swap and it ran well for about three months. Lately the car has been sputtering and jerking really bad as i go to higher rpms in each gear, and also stalling out while coasting. First I replaced the fuel filter and it ran fine for a little while then started sputtering again, so I believe it might be the fuel pump? Opinions?

[Fbomb19]

Omg bro. I have the same fcuking problem. Ill run my car for about 50 miles and then it shuts down on me and then turns off ever 5 min. and then if i let it sit over night its good for anotehr 50miles. people tell me its the fuel pump but i dont wanna change it and then its some thing else. Im getting so stressed about this stupid thing. ive posted my own thread about it 2. lol no ones said anything yet.

[canyouSAY240]

is your fuel pressur regulater getting the right vaccum psi? a drop in psi could cause it to lean out and sputter