I have a manual 2008 JKU. Yesterday morning it started fine twice, then I was leaving a parking lot and it started fine, when I was pulling out it stalled (I think this was my fault, not the jeeps). I restarted it and it stalled again this time on it's own. I tried a third time and it won't turn over at all. Here's where I am at now:
-All electrical systems work(stereo, locks, Windows, etc.)
-Cranks with normal power, just doesn't fire up.
-Tried jumping, rocking, rolling, pulling fuse, lights on/off.
I have tried many times since event and it shows no signs of firing up.

Additional info: I do have a sound system with a 1900W amp running straight to the battery.

Any information or suggestions is highly appreciated. I live 30 Miles from work and need to solve this quick with little funds. Thank you.

 

I would clean the Idle Air Control Valve ( IAC )with throttle body/air intake cleaner first see if that helps,

happened to me sometimes it would start then die after 3 seconds or would not start at all

 

Is there an unlabeled red light glowing by the fuel gauge? If so, your Sentry security system thinks your key is invalid. Disconnect battery for a minute, reconnect and see if it doesn't start okay.