05-19-2016, 04:44 PM | #1 |
Drives: 2011 Camaro 2SS Manual Join Date: May 2016
Location: Macon, Georgia
Posts: 24
|
CAN SOMEONE PLEASE TELL ME WHAT THIS NOISE IS?
I have a 2011 Camaro SS (6MT). I have been hearing wierd rattling sound coming from under the car. When I do a cold start, the car is jerkier with less power. But when it warms up, the car is smoother with more power and no rattle. I do not hear the rattling when I do a cold start. It happens only after it warms up and has been driven. It rattles at low rpms, and when I rev up the car. Here is the video of the noise.
https://youtu.be/rcBiFExFpig EXTRA INFO: Magnaflow Comp Exhaust System Fresh Fluids Stock Engine with CAI Stock Tune No Codes
__________________
2011 Chevrolet Camaro SS (6MT)
|
05-19-2016, 05:36 PM | #2 |
Drives: 23 LT1 / 19 Z06 / after 6 5th gens Join Date: Jan 2014
Location: MI
Posts: 2,017
|
Hard to tell from the vid. It almost sounds like a belt, but if it's coming from underneath, it could be an exhaust rattle
__________________
"Make yourself sheep and the wolves will eat you"
|
05-19-2016, 05:38 PM | #3 | |
Drives: 2011 Camaro 2SS Manual Join Date: May 2016
Location: Macon, Georgia
Posts: 24
|
Quote:
Sent from my SM-G930V using Tapatalk
__________________
2011 Chevrolet Camaro SS (6MT)
|
|
05-19-2016, 08:27 PM | #4 |
Drives: 2011 2SS/RS M6 Join Date: Oct 2015
Location: Utah
Posts: 1,940
|
Check the tunnel cross brace for contact with your exhaust. As far as less power and jerky, I notice my 11 is a bit jerky at very low speeds and load when it's cold. But once it gets going it's no problem.
|
05-19-2016, 08:31 PM | #5 | |
Drives: 2011 Camaro 2SS Manual Join Date: May 2016
Location: Macon, Georgia
Posts: 24
|
Quote:
Sent from my SM-G930V using Tapatalk
__________________
2011 Chevrolet Camaro SS (6MT)
|
|
05-19-2016, 08:44 PM | #6 |
Drives: 2011 2SS/RS M6 Join Date: Oct 2015
Location: Utah
Posts: 1,940
|
Which sensor are you looking at? Only the upstream 02s will affect the way a car runs. On cold startup you car is in open loop which means it ignores input from them anyway and goes off a base value. Downstream O2s will only monitor the efficiency of the catalyst and in no way affect the fuel trims.
|
05-19-2016, 08:46 PM | #7 |
Drives: 2011 Camaro 2SS Manual Join Date: May 2016
Location: Macon, Georgia
Posts: 24
|
It was warm. So when the motor gets to temperature, the pcm starts? Holy s*** that's advanced haha.
Sent from my SM-G930V using Tapatalk
__________________
2011 Chevrolet Camaro SS (6MT)
|
05-19-2016, 08:47 PM | #8 | |
Drives: 2011 Camaro 2SS Manual Join Date: May 2016
Location: Macon, Georgia
Posts: 24
|
Quote:
Sent from my SM-G930V using Tapatalk
__________________
2011 Chevrolet Camaro SS (6MT)
|
|
05-26-2016, 07:42 PM | #9 |
Drives: 2015 ZL1 Join Date: Jan 2015
Location: Oceanside, CA
Posts: 313
|
Sounds like an exhaust rattle. May want to take a look at crossbraces, heat shields, and anything else that comes close. When the car is warm, the exhaust pipes expand, and is sometimes just enough to come into contact with something else.
|
|
|
Tags |
5th gen, camaro, exhaust, noise, rattle |
|
|