Dynotune F/P Gauge Question

[texas-buzzard]

I have the sending unit mounted in the fuel rail and am useing the rectangular readout. At idle the F/P reading is correct and stable but at cruising and under boost the readings fluctuate all over the scale. is this normal for an FMU setup? My A/F is correct at all throttle settings.
Thanks

 

[Commuta_Busa]

with the FMU it could be bouncing around a bit. How's your voltage at the pump?

 

[texas-buzzard]

I mounted an analog gauge and it was very stable. i guess it is the sender that is irratic. probably will go with the analog gauge.
Thanks