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03-02-2017, 07:58 AM
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#1 |
 Drives: 2018 Camaro ZL1 Join Date: Aug 2015
Location: Colorado
Posts: 46
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High Idle At Startup
Recently I have noticed my 2ss seems to be idling a little rough and high at startup, I would say roughly 1100 rpms or so. If I let it idle for a while, say two minutes, it then goes down to around 600 rpms. Any ideas on what this could be or if it warrants a trip to the dealer? Car is stock except for CAI.
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03-02-2017, 08:04 AM
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#2 |
 
Drives: 16 Summit white, Ceramic white 2SS Join Date: Jan 2016
Location: Places
Posts: 419
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Totally normal, they all do it for warm up. Occasionally while warming up the whole car will rock and it seems like a back fire. Rest easy
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03-02-2017, 08:09 AM
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#3 |
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雪の玉
Drives: '22 Z71 RST Silverado Join Date: Feb 2011
Location: South
Posts: 3,415
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I'd worry if it didn't high idle at cold startup and then drop down. What you're describing is normal. Every vehicle we own does that.
Last edited by nancygrl; 03-02-2017 at 10:04 AM. |
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03-02-2017, 08:19 AM
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#4 |
   
Drives: 16 Camaro, 11 Stryker, 00 Explorer Join Date: Dec 2015
Location: NJ
Posts: 1,214
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Completely normal. Mine (and all others I assume) do it as well.
__________________
NGM, 2SS, 6MT, NPP, MRC, Nav, Kalahari, Grey Wheels
1100 12/14/2015 3000 1/8/2016 (TPW 2/1) 3800 2/1/2016 5000 3/5/2016 |
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03-02-2017, 10:21 AM
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#5 |
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Drives: 2018 Camaro ZL1 Join Date: Aug 2015
Location: Colorado
Posts: 46
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Thanks guys. I appreciate all of the responses. I just don't remember it sounding like this before, but could totally be something that I was just not paying attention too.
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03-02-2017, 10:23 AM
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#6 |
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That is what we call a cold start, completely normal! I'd be flipping out if it DIDNT happen every morning
__________________
Rotofab CAI, Mishimoto Catch Can. Other than that Stocky-McGee for now
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03-02-2017, 10:46 AM
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#7 |
       
Drives: 2016 Garnet Red Camaro 2SS Join Date: Jul 2015
Location: North Carolina
Posts: 5,435
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Plus with DI, they do run rough until enough pressure is built up, then everything evens out. The LT1 though does naturally have a little bit of a roughness to it, even when warmed up. It is part of its character.
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2SS Camaro, Garnet Red, Adrenaline Red, NPP, MRC, A8, 5 Split Spoke Bright Silver Wheels (56W)
1100 Status - 7/24/15 (Ordered) 3800 Status - 10/13/15 (Built) 6000 Status - 12/22/15 (Delivered) |
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03-02-2017, 12:18 PM
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#8 |
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Drives: 2018 Camaro ZL1 Join Date: Aug 2015
Location: Colorado
Posts: 46
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And I love that side of the car. Just something weird I noticed. It definitely could have been the weather getting a little colder lately too as the roughness is not as noticeable when it is warmer.
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03-02-2017, 12:37 PM
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#9 |
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A lot of that high idle at start up is to get some spent gases flowing through the cats so they start working properly faster to meet EPA emissions requirements. The fancy metals lining the cats don't work well until they get hot. A high initial idle assists with that.
Bottom line - as all others have said its normal.
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2016 Camaro 1SS Hyper Blue 6MT NPP
2010 Camaro 2SS Cam/Headers/CAI/3.91 gears 476 rwhp/440 rwtq (sold) |
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