16 is a fuel injector error code... Could definately cause the described problem... IMO Id just swap that DPFI crap out for a nice MPFI setup... If your looking for ANY kind of performance, thats the best first step... Youll notice more of a difference there than either the header or intake thats on there now could ever do... And yes, 17 is probably from the VSS which is probably just unplugged... They are cable driven assemblies and come loose a lot because of the clip that holds them on (its a pain to get back on just right and comes loose)...