I have a 90 XJ and when I go offroad or on very bumpy roads, my vehicle likes to die completely. I can immediately shift into neutral and start my vehicle with no problem. But I'm not exactly sure why it does it. Could it possibly just be my battery hitting my hood and shorting out? Also, I have a vacuum leak that I know about because my heat only blows through the defroster vents. AC doesn't work at all. Could that be related? Thanks in advance

 

Is your battery fastened down?

If not, you're looking to burn your Jeep to the ground off-roading.......