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05-24-2019, 02:47 PM
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#1 |
 Drives: chevy camaro 2ss Join Date: May 2019
Location: gilbert, az
Posts: 2
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high rpm issue
hi I got a 2011 camaro 2ss, just small cam done about 25k miles ago all of a sudden I go out to run my buddy and we got on it at about 5k rpm my car starts to hesitate and lose power, cel light starts blinking. what's weird is the car runs fine at idle and drives normalits only when its WOT at about 5k rpm. I cant describe the sound it's almost like a vibration coming out my exhaust like it's not exhaustingeverything. any ideas on what I can check to diagnose this issue?
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05-24-2019, 02:51 PM
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#2 |
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Donkey Dick Cam Camaro
Drives: 2010 2SS/RS LS3 M6 Join Date: Oct 2009
Location: Los Angeles, CA
Posts: 1,998
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check the valve springs
sounds like valve float doe to weak valve springs. Sent from my SM-G975U using Tapatalk
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 Bone Stock |
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05-24-2019, 03:43 PM
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#3 |
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Drives: chevy camaro 2ss Join Date: May 2019
Location: gilbert, az
Posts: 2
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il definitely look into that, how can you tell if a springs bad though?
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05-24-2019, 04:29 PM
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#4 |
 Drives: 2011 1SS RS Camaro, 1995 LSX 240SX Join Date: Mar 2011
Location: Austin, TX
Posts: 461
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If the spring is broken, it will be obvious, but a weak spring is harder to diagnose. Normally I'd pull them off and test pressure individually but not everyone has that equipment available.
Start by reading the stored codes from the ECU. If the CEL is blinking then it is properly detecting the misfire. That code will give you the cylinder to chase and make it easier to identify the problem.
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2011 Camaro 1SS
Whipple Supercharged street monster |
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05-24-2019, 04:54 PM
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#5 |
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Account Suspended
Drives: 15 2lt RS Top Gun Camaro Join Date: Mar 2019
Location: us
Posts: 389
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Could be a cracked spring too, just so know always warm the engine up fully before running it hard. Cold valve springs break-crack easily.
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05-24-2019, 05:33 PM
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#6 | |
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376 cubic inches of fun
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Quote:
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05-25-2019, 03:28 PM
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#7 | |
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Account Suspended
Drives: 15 2lt RS Top Gun Camaro Join Date: Mar 2019
Location: us
Posts: 389
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Quote:
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05-25-2019, 04:50 PM
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#8 | |
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Fast Cars and Old Guitars
Drives: 2015 2SS RS (L99, baby!) Join Date: Apr 2012
Location: N. CA
Posts: 3,973
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Quote:
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“I don’t want to belong to any club that would have me as a member.” - Groucho Marx
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05-25-2019, 08:49 PM
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#9 |
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Account Suspended
Drives: 15 2lt RS Top Gun Camaro Join Date: Mar 2019
Location: us
Posts: 389
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I was being sarcastic......most springs fail because of revving before the springs are up to temp.
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05-25-2019, 09:45 PM
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#10 |
         
Drives: Miss Con Ception Join Date: Aug 2016
Location: Chicagoland
Posts: 2,998
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From what I have read on here springs on high-lift cams may need to be changed as often as 20,000 miles.
So...
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2011 1SS/RS LS3 CGM
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