NEED ADVICE----turbo kit is on, we installed 800cc injectors last night and the tune that was on the car that the turbo kit came off of, I know it will need adjusted, but... we are running into injector issues, 1 and 3 are not sending the amount of fuel that they should, you can listen to them, 2 and 4 thump hard, 1 and 3 are thumping lightly. All connections to the clips are good, soldered together, we put a tester in the clips with the car running and all injectors are getting the signal to spray fuel... Any ideas?

MODS ARE:

GT3076R
Ported TSI Log Manifold
800cc Injectors
Stock FPR and FP
K-Tuned Fuel Rail

---After doing more reading, wondering if my aftermarket fuel rail is the problem, especially since i dont have a return line.