- Buick Ownership
- 2004 Buick Lesabre Custom
I have on 04 Lesabre with 110,000 miles on it. There is a misfire under slight load (about 20% according to Torque Pro). It clears up under heavier load. It doesn't happen at low speeds. I notice it most at highway speeds. The CEL is not on. I have tried holding the throttle at the point where it happens attempting to trigger a code without success. I have been researching online but found that the solutions are all over the place. If anybody has had this issue before, I would appreciate some guidance. Thank you.