[Kingpin665]

To respond to Knightwarrier first, gun was upgraded about two years ago and worked fine until this year, but wasn't used at all last year. I do have multiple batteries all yielding the same result. The upgrade was done by JohnnyDo and consisted of:

1 TM M4A1
1 Guarder FTK-40 Guarder Full Tune Up Kit For M4A1
"S303 Stainless Steel, Brass, Polycarbonate, Aluminum, Acetal and Steel
SP120 Spring (Oil Quenched/Tempered Si-Cr Alloy Steel Wire)
Polycarbonate Piston
Air Seal Nozzle
Ball Bearings Spring Guide
Polycarbonate Ventilation Piston Head
Stainless Cylinder Head
Lucid Chromium Plating Cylinder
Original Type Steel Gear
Enhanced Tappet Plate
6mm Steel Bushing
Shim Set
SUPER-LUBE Oil X3"
1 GE-07-01 Guarder Hop Bucking
1 Z-09-26 Systema BS 6.04mm Barrel for M16A1

So I tried cleaning the connectors with lighter fluid although they didn't look dirty or worn in any way and tightened their clamp where the wires attach. No luck... when I connected the motor without putting it in the grip it spun like a madman but when I put it in the handel and tried it again I got one shot before it stopped again. But this time I could hear it TRYING to turn but wouldn't budge.