I've had this problem where if my battery dies and I try to jump it, it starts up fine but as soon as I get around 2k rpm my car briefly looses all power and then comes back on making it buck back and forth while driving. I think its a problem with my boost a pump requiring more voltage than my almost dead battery can put out in it's current state. Alternator is working perfectly and it revs just fine in neutral. Has anyone experienced a problem like this? Maybe a fuse I need to upgrade for the voltage or something? (25amp instead of a 15amp)?