so my jeeps only done this twice now but I'm concerned as anyone would be. once it has sat for a while, especially now that its cold, first off it wont turnover, which is my nss and I'm aware of that, but it will normally turnover and start with a little push on the shifted. twice however, this worked to get it to turnover, but then it wouldn't start without applying some pressure on the gas pedal, and would stall if I let off. however, after doing this a few times it ran fine without stalling until it sat again for a few days in the cold then the exact same thing happened.

I'm here to ask what could be cause it to stall until its warmed up? could it be related to the nss in anyway?

 

You have 2 separate issues.

1. Refurbish your NSS. It needs it.

http://go.jeep-xj.info/HowtoNSSrebuild.htm

2. The stalling issue could be a number of things, ranging from a marginal battery to a bad throttle position sensor to a dirty throttle body and or idle air control. Start by load testing your battery and then testing your TPS.

 

I think you may be right about the battery because what I didn't mention in the post is that somehow its losing power when parked because my radio is reset and my cel from my exhaust is gone

 

MUST load test that battery first. Any parts store will do this for you for free. This is absolutely job#1. See where you're at after that.

Stalling is a very common symptom of a marginal battery.