11-21-2020, 04:56 PM | #1 |
Hillbilly Highness
Drives: 2001 S10, 2022 LT1 Vert Join Date: Jul 2018
Location: GA, USA
Posts: 72
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LT1 Odd Sounds
Car: 2020 LT1 A10 NON - NPP Exhaust Convertible ~1K miles.
Symptom: After a cold start when the AFM changes from V4 to V8 I can hear a phoosh type sound. Almost like a BOV. The sound is fairly centered in the car. Maybe right under the passengers seat? This is a vert and the top is down when I hear it, so maybe it isn't too loud... but my wife actually hears it and she typically hears nothing auto related unless the engine has fallen out! After the car heats up a bit, it seems to go away. I have also noticed the dreaded AFM valve squeak. This is not that... more of a wind rushing type noise. I don't need to be giving it much throttle at all for it to occur, just the change from 4 to 8 cylinders. When it does happen there is no other symptom that I can tell... just the noise. Is this yet another AFM valve sound, or something else entirely? Thanks all, Ox. |
11-21-2020, 06:46 PM | #2 |
Drives: 15 SilveradoLTZ,162SSVert BlazerRS Join Date: Dec 2015
Location: Minot,Maine
Posts: 644
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AFM dosent make ANY noise, I Know I have 2 Cars and 1 Truck with it, Without a recording of the noise its not possible to nail down!!!!
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11-21-2020, 09:02 PM | #3 | |
Drives: 2017 Camaro 2SS Join Date: Jul 2016
Location: SC
Posts: 185
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Quote:
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2017 2SS A8 TSP LT's, ported msd/95 mm, e85
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11-22-2020, 06:47 AM | #4 |
Drives: 2019 Camaro 2SS Join Date: Nov 2019
Location: Connecticut
Posts: 135
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WOW, this is interesting stuff.
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2019 Camaro 2SS, Shadow Grey
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11-23-2020, 02:46 PM | #5 |
Hillbilly Highness
Drives: 2001 S10, 2022 LT1 Vert Join Date: Jul 2018
Location: GA, USA
Posts: 72
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