is it possible to 'blip' the 4.3l vantage engine manually (maybe via the throttle body) in an effort to determine what is responsible for the (apparent, IMO) lack of responsiveness in the 4.3l engine? IOW, trying to eliminate the 'throttle by wire' activation of the throttle body and do it manually. wondering if any lack of responsiveness is due to the EMU (if that's the right acronym) software.