Having problems with your 1999 Buick Regal ?
Code po422 evaporative emissions small leak ,,,,,,,, what steps do i take to find leak?
Repair Help & Product Troubleshooting for 1999 Buick Regal
Tips for a great answer:- Provide details, support with references or personal experience .
- If you need clarification, ask it in the comment box .
- It's 100% free, no registration required.