This is the real la bamba intro:
E-------------------------------------------------------------
B-------------------------------------------------------------
G-------------------------------------------------------------
D---------2-0-4-2-----0-0-------2-0-4-2-----------------------
A------0-4----------2----4-2-0-4------------------------------
E-0-2-4----------0-4-------------------0----------------------
E-------------------------------------------------------------
B-------------------------------------------------------------
G-------------------------------------------------------------
D---------2-0-4-2-----0-0-------2-0-4-2-----------------------
A------0-4----------2----4-2-0-4------------------------------
E-0-2-4----------0-4-------------------0----------------------