Q: Idle and start up issue

asked by on October 14, 2016

Hey I have a 2002 Honda civic and when I start it in the morning it start but sounds kind of rough or rumbling under the hood and muffler seems to be puffing sometimes I've noticed there's a hair line crack in the exhaust manifold could this be why I'm getting these problems?

My car has 290000 miles.
My car has an automatic transmission.

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