trouble with a 99 camaro

[FRENCH_CAMAROV6]

The friend has troubles with his 99 camaro

He put gaz on it at the station and since the car shakes, has misfires,smells burned plastic and has a great power loss

What do you think of it?

[Speed Freak]

Check the cat

[FRENCH_CAMAROV6]

there's the check engine light too

there's a way to know if it's the cat who's messing up?

there's a leak after the cat

[malice10985]

Find out why the check engine light is on. That will give you a clue to start your search from.

WHen my cat was clogged, my car got really quiet, it misfired a lot, and it had a huge power loss. It didn't really shake though.

[CamaroRob97]

Don't rule out bad gas, you said he filled up then it happend.