V6 engine surges after storage. It surges in PARK and in NEUTRAL. Seems that TCS is engaged in drive.

Hello. It seems your car's TCS Traction Control System is malfunctioning; causing the torque converter to stay 'engaged' to the engine. This will stop the engine from running when your car is in any drive gear. I don't know what your car's electrical problem is. Good luck and keep me informed; if you want to.

Does the starter engage again when you go back to park ?
Shifting from park to drive would cut the circuit from the key switch to the starter. The neutral safety switch prevents you from cranking the engine in drive or reverse.
I would say the key switch is not turning off power to the starter when you go from start to run.

Fuel pump .check fuel pressure

CHECK FOR STORED DTCS AT THE TRANSMITION ECU AND LET ME KNOW.SEEMS LIKE VALVE PROBLEM INSIDE GEARBOX

Might be two different problems.
The no crank issue could be several things including the neutral safety switch, and the other issue could be the brake switch or the shift lock solenoid.
You may be able to shift out of park when the key is between lock and on. And it may crank in neutral.

it sounds like a probem with the correlation of the throttle position sensor and the P.C,M, With the drive by wire system, throttle is no longer a command, but rather a request for throttle provided the P.C.M. gives the ok after taking readings from various sensors. this correlation for whatever reason goes wrong and often neds attention from the manufacturers mechanic for a relearn, which will relearn the throttles home position and correct the problem.

Are you check vacuum system? Some "check engine" light there?

First thing is to make sure you have a fully charged or good battery. If Ok
Use scanner and read codes.
Depending on what codes tell you do the testing and repair required .
Right now your TCS is not operable and the transmission is only operating in third gear.
Get back to me with the codes and we will take it from there. This could be anything from wheel sensors to shift solenoids,

try doing the change while engine off and in neutral, or engine runnin and in neutral. if not try same in Park. worked for me