2003 Buick Century stumbles on acceleration

check fuel pressure with a gauge auto parts rent it. also clean throttle plate on both sides and iac hole with choke cleaner. I am assuming check engine light is not on . if it is scan for codes. should be 52-59 psi key on only

Bikewrek
10/12/2015

will try it. thanks very much

Buick Century throttle position sensors are one of the most common things I replace when you have a mid-throttle hesitation. The check engine rarely comes on is why it's so hard for the average person to diagnose. The photo below is a 2003 Century with only 77k miles and the mid-range dip is due to a bad TPS. I used an Autotap program on a Dell laptop to catch it. Replacing the sensor instantly restored it to "like new" performance.