My 91.5 started surging the other day and has been since until lastnight, the lights and motor would get bright and motor would rev up a lil then the lights would dim and the motor would rev back down all real fast for awhile until I drove for awhile then it would quit. But finally lastnight I'm guessin the alternator went out cuz me and my girlfriend went and ate and when we was leavin we got back in it and she was dead so this mornin I put a new alternator, voltage regulator, and a 1,000 cranking amps battery on it. But now my voltage guage is showing it's only charging like 10 volts and my lights are a little dim. What could be the problem??