Eratic IDC kicking my butt

Remote tuning a car on the dyno. For some reason around 4400 rpm my IDC is getting very erratic, and I'm lost as to what's causing this.

Everything else seems good.

Car is a 426, unknown cam, kenne bell at about 12psi. Couldnt make the car run on ID1050x data so I plugged in the data for some FIC 1000 injectors and its been doing great. Fuel pressure was a little low, now its sitting a hair high (62psi) and holding steady through the pull.

Any suggestions appreciated

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