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loss of power-rough idle 2011 6.2L


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#1 michigan2500hd

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Posted 20 March 2012 - 07:23 PM

My 2011 1500 6.2L crew cab was parked for a few days and ran fine last time I drove it. Today I after starting I noticed it took an extra half second or so to start and idled a little rough but figured it was because I hadn't drove it since Friday. I thought it felt kinda doggy taking my daughter home and I could feel it mis and watch the tach move a little at idle. At the stop sign I turned of the trac control and floored it. Didn't get much more then a chirp of the line although when the rpms climbed it was breaking the tires loose here and there through second. Nothing compared to what the truck used to do lol. It has 7500 miles on it and no real problems til now. Any ideas???
2011 Chevy 1500 LT CC, 6.2l, Z71, 3.42

#2 Stevens11

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Posted 20 March 2012 - 07:42 PM

Bad gas :dunno:

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2007 Sierra 6.0 Vmax crewcab 4x4, 275/55r20's Cooper Zeon LTZ tires, Corsa Sport Exhaust, Denali Grill, Bedrug, Extang Full Tilt Tonneau Cover, Blackbear performance Custom tune
2003 Silverado 5.3L extended cab 4x4, 6" Skyjacker lift, 315/75r16 BFG tires, Goodmark Cowl hood, Billet grill, K&N 77-Series intake, Magnaflow exhaust, Wait4me PCM tune
2001 S10 Crewcab 4.3L 4x4; 3" body lift, 31" BFG K/O tires, Flowmaster 50-series exhaust, K&N 63-series intake, relocated IAT sensor, E-fans, TB Spacer, Jet stage 2 chip with B&M shift improver

#3 RyanbabZ71

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Posted 20 March 2012 - 07:54 PM

What did it do when you restarted the next time?

Ryan

2010 Silverado Crewcab 4wd Z71 6.2L V-8 (L9H) Flex Fuel 6 Speed Transmission Sheer Silver Metallic
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#4 michigan2500hd

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Posted 20 March 2012 - 08:12 PM

I sure hope that's all it is..its at 3/8 on the gauge now..wonder if I should run it almost dry or try to dilute it with new fuel..hmm
2011 Chevy 1500 LT CC, 6.2l, Z71, 3.42

#5 michigan2500hd

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Posted 20 March 2012 - 08:16 PM

Havnt tried it since that episode which was this evening. We had a baby boy Saturday and after 4 days at the hospital I'm wore out lol..will see if its still acting goofy tomorrow but I don't think I will tow the trailer yet. When I got on the gas hard I heard a whine that sounded like a supercharger..forgot to mention that..not sure if its normal with the six speed or not. It wasn't loud at all but with the window down it was audible..thanks guys
2011 Chevy 1500 LT CC, 6.2l, Z71, 3.42

#6 highspeedvehicle

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Posted 20 March 2012 - 08:37 PM

Congratulations!! And hope the rough idle goes away. I sometimes experience this with my 6.2 but it doesn't last very long.
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#7 becker87

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Posted 20 March 2012 - 10:07 PM

Congrats on the Baby, my guess would be bad gas as mentioned before. I have ran a bad tank of E-85 through and the motor acted funny.
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#8 RyanbabZ71

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Posted 21 March 2012 - 10:11 AM

Congrats on the baby. We are 10 weeks away from #2

Ryan

2010 Silverado Crewcab 4wd Z71 6.2L V-8 (L9H) Flex Fuel 6 Speed Transmission Sheer Silver Metallic
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#9 ChevyTech77

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Posted 21 March 2012 - 10:23 AM

E-85 or premium fuel?

Honestly, I have had it happen in mine with both types of fuel though. Just every once in a great while it will do that.
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#10 michigan2500hd

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Posted 21 March 2012 - 12:32 PM

havnt used E85 in it yet and 95% of the time its 93 octane that I use. Once in a great while if I'm low on cash I put 89 in it. Thanks for all the congratulations :)..oh and Ryan get your sleep now!..lol..been up for 5 nights so far and feeling like a zombie lol..drove the truck just now to a job 25 miles away some mixed driving ..been taking it real easy and it seems a little more reponsive. Averaged 19.6 mpg today :)..on the way home I won't take it quite as easy lol
2011 Chevy 1500 LT CC, 6.2l, Z71, 3.42

#11 RyanbabZ71

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Posted 21 March 2012 - 03:51 PM

Sleep? Our son is an awesome sleeper never had issues at all. Hope the next is the same

Ryan

2010 Silverado Crewcab 4wd Z71 6.2L V-8 (L9H) Flex Fuel 6 Speed Transmission Sheer Silver Metallic
2012 Camaro 2SS Convertible 6.2L V-8 (L99) Ashen Gray Metallic
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#12 K5MudDog

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Posted 21 March 2012 - 07:04 PM

my 84 350 k5 blazer has the same problem lost power and crap idle
back woods gun toatin baccor juice spitting beer drinkin truck fixin deer shootin quail eatin mud pitt muddin truck drivin 6 ft 3 tall problem solvin redneck
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#13 Stevens11

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Posted 21 March 2012 - 07:28 PM

Sleep? Our son is an awesome sleeper never had issues at all. Hope the next is the same


Hahahahaha my first one was a sleeper too... :crackup:










My wife and I always say... if we had "him" first,.... there might not of been a "her"... :crackup:

Edited by Stevens11, 21 March 2012 - 07:30 PM.

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Storm Gray TRUCK CLUB: Member #1
2011 GMC Sierra SLT Crewcab 6.2L with NHT and 3.73 gears


Visit My Website


Current truck:
Denali Grill, 2" RC Leveling kit, Boss MT100 20x8.5 wheels w/ 305/50r20 Cooper Discoverer H/T Plus tires, Blackbear tuned, Extang Full Tilt Bed cover, GMC Bedrug, 15% Tint, and Custom Dynamics light bar.

Previous trucks:
2007 Sierra 6.0 Vmax crewcab 4x4, 275/55r20's Cooper Zeon LTZ tires, Corsa Sport Exhaust, Denali Grill, Bedrug, Extang Full Tilt Tonneau Cover, Blackbear performance Custom tune
2003 Silverado 5.3L extended cab 4x4, 6" Skyjacker lift, 315/75r16 BFG tires, Goodmark Cowl hood, Billet grill, K&N 77-Series intake, Magnaflow exhaust, Wait4me PCM tune
2001 S10 Crewcab 4.3L 4x4; 3" body lift, 31" BFG K/O tires, Flowmaster 50-series exhaust, K&N 63-series intake, relocated IAT sensor, E-fans, TB Spacer, Jet stage 2 chip with B&M shift improver

#14 Wolfmanjohn

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Posted 22 March 2012 - 10:57 AM


Sleep? Our son is an awesome sleeper never had issues at all. Hope the next is the same


Hahahahaha my first one was a sleeper too... :crackup:
My wife and I always say... if we had "him" first,.... there might not of been a "her"... :crackup:


Yeah, good luck with that, Ryan! :crackup: If the first one don't getcha, the second one will! Don't ask me how I know!
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#15 GM Customer Service

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Posted 23 March 2012 - 05:34 PM

Congrats on the new baby! I would recommend keeping an eye on this and mentioning it at your next dealer visit. If it gets any worse, take it in. Feel free to contact me as will if you need further assistance, and I would be happy to look into this on my end. Keep me posted.

Tricia, GM Customer Service.
>>>>>> Please check out the new GM Owner Center at https://my.gm.com/ for more vehicle information!




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