68TT thanks for the info. I've read about getting the TBI pressures correct for better effectiveness but that is past my level of mechanical ability, at least for now. I do have a question though. My assumption is that going to an after market unit like a Holley or an edelbrock would address the pressure needing to be adjusted. Is that a correct assumption or would the new unit need adjustment as well? In terms of dollars spent with a goal of fuel efficiency being more important than track performance is the better solution to tune the TBI I got or go replacement? Any input on this would be great.