Loss of power between 40 and 50 MPH

2003 BUICK CENTURY
120,000 MILES • 6 CYL • 2WD • AUTOMATIC
Avatar
LUANNE LAGRECA
  • MEMBER
  • 1 POST
After warms up it seems to lose power but not completely. If I accelerate it seems to help. i been told several possible causes. trying to narrow it down I can't afford more than I actually need if possible. Thanks
Mar 15, 2021 at 9:31 AM
Advertisement
Avatar
STRAILER
  • CERTIFIED EXPERT
  • 53,855 POSTS
It sounds like you have a weak fuel pump or a clogged fuel filter but to be sure we should run the codes, also can you tell me when the last fuel filter change was? it is has been awhile here are instructions on how to change it in the diagrams below.

https://www.2carpros.com/articles/checking-a-service-engine-soon-or-check-engine-light-on-or-flashing

and

https://www.2carpros.com/articles/how-to-change-a-fuel-filter

and

https://www.2carpros.com/articles/engine-has-low-power-output

Check out the diagrams (below). Please let us know what happens.
Images (Click to enlarge)
Attached Media
Attached Media
Attached Media
Attached Media
Attached Media
Mar 17, 2021 at 8:18 AM