i have a 1993 lx sedan auto that i just put a full catback muffler on it by magnaflow n i noticed that when i pull up at a red light and im sitting there that my motor runs ruff.. n befor i had the catback on it it ran smooth is this normal??

 

how do you mean rough? Does it sound louder? Can you feel the car shaking at all? How does the exhaust sound on acceleration?

 

the muffler sounds fine acceleration you just can feel the car shake when sitting in drive you take it out of drive n it clears up a little (it's an auto) but befor this it idled 2 where you couldn't feel it shake at all

 

I have this same issue on my 98 lx with around 85k, maybe its time for some sea foam??

~Anthony

 

I have a 97 civic, I suffer from this as well. It almost feels like the car is idling so low it will cop out if i just goose it. I wish someone would suggest a fix :-)