Hi. When I down-shift or slow down, I hear pinging noises from the back of the car- muffler area. What could this be? Does not happen when accelerating. Thanks.
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Thursday, January 28th, 2010 AT 7:06 PM
1 Reply
MHPAUTOS
MECHANIC
31,938 POSTS
Hi there,
Thank you for the donation,
This can often be due to a lean mixture have this checked, you may also have a small exhaust leak up stream of the cat converter.