02-27-2020, 07:32 PM | #1 |
Drives: 2019 2SS 1LE Join Date: Aug 2019
Location: CT
Posts: 112
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SS Emergency Vacuum Reserve
Hey y'all - I noticed my SS's emergency brake vacuum only lasts about a week or so before the pedal becomes fully firm again. In other words, the reserve vacuum that maintains brake boosting functionality only lasts about one week when I let my Camaro sit. Afterwards, my brake pedal is full firm as I go to start my car.
Is this in line with what you see on your cars? Should I be worried about a slow vacuum leak? |
02-28-2020, 09:37 AM | #2 |
Drives: 17 Camaro SS 1LE & 16 Sierra AT CC Join Date: Nov 2016
Location: Norman, OK
Posts: 2,424
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i am confused as to what your question is, the vacuum booster starts to lose vacuum the moment the engine is turned off.
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02-28-2020, 09:53 AM | #3 |
HYPER SS
Drives: 2016 Supercharged 2SS Join Date: Feb 2014
Location: Troy OH
Posts: 1,252
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..and your emergency brake is driven electronically not by vacuum.
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02-28-2020, 10:57 AM | #4 |
Drives: 2017 2SS, 50th pkg, M6, MRC, NPP Join Date: Jan 2016
Location: Ocean City, NJ
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02-28-2020, 05:17 PM | #5 | |
Drives: 2017 chev camaro Join Date: Feb 2020
Location: ny
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02-29-2020, 05:51 AM | #6 |
Drives: 2019 2SS 1LE Join Date: Aug 2019
Location: CT
Posts: 112
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Apologies for the confusion, ladies and gents.
arctic rs 52 has the right idea - the power brakes, which work off manifold vacuum, have (or at least had, idk about today) some sort of check valve which allows the power brakes to work in case the engine stalls while driving. In previous cars of mine, I've been able to let my car sit for over a month without losing vacuum out of that check valve - my Camaro only lasts one week. It's a bit of an odd question, I totally agree. I'd just like to know whether I need to bring my car in for warranty service with some experiences from y'all. For those of you who let your camaro sit for more than a week at a time, is your brake pedal rock hard when you go to start the car? |
02-29-2020, 08:54 AM | #7 | |
Drives: 2018 Camaro 2SS A8 Join Date: Jul 2017
Location: East Tennessee
Posts: 12,025
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Quote:
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02-29-2020, 03:05 PM | #8 |
Drives: 2019 2SS 1LE Join Date: Aug 2019
Location: CT
Posts: 112
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Interesting - thanks for the feedback, arpad_m. Gives me a lot more confidence my car isn't subtly broken in a way I'll have to fight my dealer about.
Thank you! |
02-29-2020, 07:28 PM | #9 |
雪の玉
Drives: '22 Z71 RST Silverado Join Date: Feb 2011
Location: South
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I've had it happen twice, not worried as it's always been after not driving for a week or longer and only during the winter and pedal is normal after starting up.
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03-02-2020, 03:17 PM | #10 |
Drives: 2018 Camaro 2SS A8 Join Date: Jul 2017
Location: East Tennessee
Posts: 12,025
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Just brought the car out of hibernation a few hours ago, same rock hard brake pedal as always after several weeks of non-use. And everything was normal again once I started the engine.
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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 |
03-02-2020, 08:03 PM | #11 |
Drives: 2000 Trans Am M6 Join Date: Mar 2018
Location: Dublin, CA
Posts: 134
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A week is a long time for the brake booster to hold a vacuum. No big deal if the pedal goes firm after the car has been sitting so long.
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03-03-2020, 06:26 PM | #12 |
Drives: 2019 2SS 1LE Join Date: Aug 2019
Location: CT
Posts: 112
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Thank you all for your responses; I really appreciate it. I seem to remember my Fiesta ST lasting over a month, but I didn't have to press the brakes to start it, so maybe I just never stepped on the brakes before starting the car.
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