We had the code ran it was a miss fire ingin. We changed plugs, wire, fule filter, and it still surges,at slow take off, and engine light still coming on, it has 3 coil packs, I really don't want to have put on computer just yet. Any ideas. Open to suggestions.

It also lose's power up hill.

. Ensure the spark plugs (ACDelco only) were identical to what originally came in the car and that they were gapped to specs.

. Replace coil packs.

Be sure to use dielectric grease on all connections and porcelein portion of plugs.

This link should help:

https://www.askmehelpdesk.com/cars-t...ml#post2028083