Need feedback on issue

[1999 White C5 Coupe]

Have a 2011 Ram 1500 4x4 with a 5.7 hemi, my MDS system failed so bought a complete kit from AMS Racing with a Diablo predator 2 tuner, Kit all installed without a any issues, runs great. 44 days later new issue, driving along cruising getting surging at pretty much all speeds and when coming to a stop it completely like someone shut the fuel off. At first i was thinking TPS but after dying 4 times this morning coming to a stop I'm now leaning more towards fuel pump. Truck has 200k miles on it when we got it but motor had been changed apparently, so it's possible the fuel pump has an equal 200k miles on it too. Any thoughts ?

What have you determined?

 

[markabby]

is it fixed?