Car cutting off.
I gave a boost to a friend and the car will now start
sporadically and then cut off. The battery does not
hold a charge.
Did you jump the other car with your engine running? If so you may have caused a voltage feed back that could have harmed the PCM. Now your battery won't hold a charge, this could have been caused by the extra amount of energy required to crank the other engine, when a battery is getting towards the end of it's life sometimes a larger load than is normally needed will short out a cell and then that causes the drain internally on the battery, a load test of your battery will tell the tale on that.
Have your battery load tested. Don't jump start with your engine running.
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#3David Mitchell Sr.Reputation830