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What is causing this pinging noise?

Tiny
U_RYOUNG
  • MEMBER
  • 2006 CHEVROLET SILVERADO
  • 7,500 MILES
I have a 2006 chevy silverado 1500 4.3 v6. I had two check engine codes. The first one was for the oxygen sensor in bank 2. I replaced the sensor and the code went away. The second code was from multiple misfires. I changed the cap, rotor, and wires and this made that code go away. Now there is a loud pinging noise coming from the passenger side of the truck. There are no check engine lights on anymore. What could cause the pinging noise?
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Friday, June 1st, 2012 AT 3:27 PM

3 Replies

Tiny
KHLOW2008
  • MECHANIC
  • 41,814 POSTS
You need to find out where the noise is being emitted from for us to be able to assist you.
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Friday, June 1st, 2012 AT 3:38 PM
Tiny
U_RYOUNG
  • MEMBER
  • 2 POSTS
Seems from the general area of the flex plate. My thoughts are it could be the cat in the y-pipe.
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Friday, June 1st, 2012 AT 3:44 PM
Tiny
KHLOW2008
  • MECHANIC
  • 41,814 POSTS
It is possible as misfires can cause the cat to go bad due to overheating if excessive fuel had been discharged to it for extended periods.
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Friday, June 1st, 2012 AT 7:52 PM

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