ok that serial number range does fall within the Tier 1
since your alternator output is normal then forget that, was only a suggestion anyway based on what i found in the bulletins.

since you are only getting a surge during full throttle and no codes, have you tried cleaning out the injector body throat? Pull the injector and clean it with non-volitile cleaner like contact cleaner? pull the fuel sensor plate and clean out the last chance filter element?
Also just for posterity and thinking outside of the box.... Try running without the air filter to see if there is any restrictions due to a stopped up filter?

worst case scenario would be a mechanical issue in the throttle body?

I would suggest watching what is going on while this surge is happening on the laptop with the diagnozer program, might give you a better idea of what is going on, this may not be an option for you though, just a suggestion :o)