When my car is cold started it doesnt wanna move until it has been warmed up for about 15 seconds or so... im thinking its the GSX fuel pump that i installed but im not completly sure... does anybody have any ideas?

my mods are as follows

Kore INtake
4-2-1 Headers
2.25 Highflow Cat
2.25 Full exhaust
NX wet kit

The car really pulls alot stronger since the new fuel pump install, but only stumbles almost 2 the point of stalling when the car is still cold and the car is put into drive and tried 2 move

 

yeah most likely it is the pump. You may want to look into a raising rate fpr or better yet a piggy back fuel computer.

 

Before moving off, it is good practice to allow the engine to run for 30 seconds or so, just to get the oil circulating around in any case!.

 

the aftermarket fuel pump you installed is probably flowing more fuel than the stock fuel pressure regulator can handle. So you run rich for the first few seconds until the ECU gets a handle on the injectors. Give it 30 seconds before driving off, or get an aftermarket FPR.