tuning problem????

[andronitrate]

Have been trying to fix this problem for months and was hoping someone on this forum might have some insight or advice. I'm trying to tune with evoscan as I usually do but out of nowhere it wont stay connected. I can start the car and drive around all I want with no issues but as soon as I do a pull it disconnects. The weird thing is it will stay connected if I do a high gear pull at low boost. Have tried different laptops and Have tried monitoring only one sensor at a time, no change. Even simple suggestions would be appreciated.

mods-

Billet DR-650's
Wastegate Upgrade Kit
HKS twin power
NGK Plugs (Heat Range 7)
ARC-2 83MM MAS (DR version)
3SX Stainless Steel YPipe
Krank Vents System
Vac reduction
EGR Blockoff Plates
walbro 255 Hotwired
Devils own progressive W/M inj
HKS EVC-S boost controller
J&S Safegaurd
ebay exhust
boost guage
AEM Wideband
manual oil pressur gauge (psi!)
AEM fuel pressure gauge
AEM AFPR
Bell Housing Brace
XTD stage 3 clutch
Setrab 920 oil cooler

recent maintenance-

02 sensors
PTU
Coilpack
head gaskets
head bolts
120k
VSS
3rd gen lifters
cam seals
main/rod bearings,and thust washers (clevite 77 coated)
oil pump
rear main seal
tranny mount
carrier bearings
ball joints
tie rod ends
shocks (kyb)
spark plug wires
fuel filter
oils-redline mtl/mt90, shockproof

[mb3000]

Is Evoscan tossing you an error message or simply disconnecting with no warning?

[andronitrate]

simply disconnects. After it disconnects it can take anywhere from 1-20 attempts to re-connect too.