1991 Buick Riviera Q&A

1991 Buick Riviera Question: WHAT ARE SOME THE CAUSES AS TO WHY THIS MODEL CAR WILL NOT PASS EMISSIONS TEST?

1991 BUICK RIVIERA -
Answer 1
Some causes are , age , mileage , and emissions faults that set codes that have not been repaired and are causing excess pollution. -
Comment 1
Could it be it's 22 years old? There's so many things that could fail the test. Contact me at jmgrhm30@gmail.com for more help. -