Rb25det Troubles

[doglive1]

I have a problem with a rb25det in a VL . when your accelerate and get to about the 3500 rpm (approx) the injectors cut out and when the rpm drops back to approx 3000 they cut back in cause it up and down like a yo-yo .Because of the smart fellas that wired it in there is no aldl connector and the ecu does not have an L.E.D ,If anyone can come up with any ideas it would be greatly appreciated.P.S its all stock standard.