How many alternator is not the point. You still need to check if this alternator is providing the correct charge. There are other factors causing the alternator to fail within a short life span, such as design, harmonic damper, quality and if rebuilt, I don't trust them to work for too long.
Have you checked the spark plugs and related components? When misfiring occurs, the engine can seems to surge.
Wednesday, September 5th, 2012 AT 7:54 PM