I would appreciate some guidance on what I should be looking for, this is a great forum and used the tips from the experts and have the site book marked for quick reference. I have a 97 STS 110k miles, no codes, all maintenance done, EGR, Throttle body, tune up etc. The car is very dependable and runs fine except I've noticed that the on throttle power seems weak. The reason I notice this is when my friends are with me (extra weight) the car has increased on throttle power and a noticable difference in the engine's power output. What sensor or sensors should I look at? I would like the car to run like that all the time.
Thanks In advanced!!!