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03-25-2019, 06:25 PM
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#1 |
 
Drives: 2017 Camaro 2SS, MRC, NPP, Join Date: Jul 2016
Location: Houstonish
Posts: 137
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another rattle
2017 2ss A8 with mrc, just under 10k miles and just recently I have noticed a rattle when the car is not fully warmed up and only upon moderate acceleration. once the car is warmed up, no rattle. it also does not rattle at idle.
any ideas where to start? it is not a vibration and I keep the car in sport mode |
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03-25-2019, 08:38 PM
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#2 |
 
Drives: '17 Hyper Blue RS, NPP, 6MT Join Date: May 2017
Location: Toronto
Posts: 98
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Is it only under acceleration or over bumps as well?
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03-25-2019, 09:27 PM
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#3 | |
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Drives: 2017 Camaro 2SS, MRC, NPP, Join Date: Jul 2016
Location: Houstonish
Posts: 137
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Quote:
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03-26-2019, 11:58 AM
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#4 |
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Drives: 2017 Camaro 2SS, MRC, NPP, Join Date: Jul 2016
Location: Houstonish
Posts: 137
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a bit more info, cold startup, car in park, rev engine and no rattle. went from sport to tour and tried it again and no change, no rattle
for first 7-8 minutes of driving, if I gas it over 3k rpm I get the rattle until I let off. It does this in tour, sport and track. after 8 minutes, rattle is gone no matter the rpm. no rattle lower than 3k rpm ever, no rattle going over bumps. it sounds like it is coming from the passenger side of the car, my daughter said she hears it from the back area of the car. I am going to empty out the trunk of all items, empty glove compartment and center and also remove my radar detector. that will make sure that it is not something I added. Last edited by zirad54; 03-26-2019 at 12:49 PM. Reason: more info |
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03-26-2019, 12:04 PM
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#5 |
   
Drives: 2016 Camaro 2SS Join Date: Apr 2017
Location: Stansbury Park, Utah
Posts: 1,092
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NPP valves?
__________________
2016 2SS, MRC, NPP, A8. Procharger P-1X,Stage II,std bypass, 3.9, Alky Meth - 10.84 @129 - DA+2000
New Mods - GPI drop ins, Kooks 2", LT4 fueling, Cam, Circle D Converter, 3.5 pulley & dual nozzle meth.  |
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03-26-2019, 12:47 PM
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#6 | |
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Drives: 2017 Camaro 2SS, MRC, NPP, Join Date: Jul 2016
Location: Houstonish
Posts: 137
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Quote:
and my understanding is that the NPP valves are consistent, meaning that it does not go away. Or, am I off here? |
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