- Jan 29, 2023
- Reaction score
I have a 99' Escalade with a 5.7 Vortec. The previous owner changed the plugs and wires but it still runs rough like a misfire. It also has a slight lifter tick. It has 240,000 highway miles. It's been sitting 9 months too. So outside of re-checking all the plugs and wires, what else should I do? Thank you for any and all advice. Its much appreciated.