Q: car has 250k miles running very rough and when it starts there is jingling noise on 2004 Cadillac SRX

Rookie cbe0621eac06868b3efe0d8d1d3611e23c60d3114864ea2ec19a68cfbd3eebab
never had tune up or timing chain done??
(1) Answer
(2) Comments
jingle or rattle sound. poss. cat. conv.
rough running. review when last tuned up. it may be due.
rec. tune up every 50,000 miles.
rec. fuel system clean. ethanol treatment to 1 tank premium fuel.
rec. oil stabilizer treatment with next oil change.