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11-09-2020, 06:49 PM
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#1 |
  Drives: 2021 Camaro LT1 Join Date: Sep 2020
Location: Tampa FL area
Posts: 795
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Thump and bump after start up
Kinda odd i guess.
But when i first start my 2021 LT1 in the AM about 2 secs after it starts up i hear and feel a thump. Only does it in the morning. Seems like it is coming from the back of the car and it is in park still. Maybe the exhaust? It has the NPP. Anyone ever have this? |
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11-09-2020, 07:21 PM
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#2 |
 Drives: 2017 Camaro 1ss A8 Join Date: Nov 2019
Location: California
Posts: 114
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Maybe it’s the NPP valve rattles. I would record a video so we can hear it, or just take it to the dealer to see what it is
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11-12-2020, 05:09 PM
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#3 |
      
Drives: like an old lady Join Date: Jun 2012
Location: indiana
Posts: 2,395
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probably just the neighbors cat.
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2016+ camaro: everyone’s first car
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11-12-2020, 05:29 PM
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#4 |
    
Drives: 2018 Camaro 2SS A8 Join Date: Jul 2017
Location: East Tennessee
Posts: 11,598
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It's the rat living in your cabin air filter box leaving for work
__________________
2018 Camaro 2SS — G7E MX0 NPP F55 IO6
735 rwhp | 665 rwtq Magnuson TVS 2300 80mm pulley | Kooks 1 7/8" LT headers | JRE smooth idle terminator cam | LT4 FS & injectors | TSP forged pistons & rods JMS PowerMAX | DSX flex fuel kit | Roto-Fab CAI | Soler 95mm LT5 TB | 1LE wheels | 1LE brakes | BMR rear cradle lockout | JRE custom tune 1100 - 1/30/18 | 2000 - 1/31/18 3000 - 2/06/18 TPW 2/26/18 3400 - 2/19/18 | 3800 - 2/26/18 4300 - 2/27/18 | 4B00 - 3/01/18 4200 - 3/05/18 | 4800 - 3/14/18 5000 - 3/16/18 | 6000 - 3/19/18 |
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