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Weird Idling? Anyone Else Have This?

slimcubby

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slimcubby Enthusiast

slimcubby

Posted
Posted

Hey guys,

 

I noticed today when I stop at stop lights sometimes the truck has a grumble and the rpm's change slightly. It almost feels like a the truck shakes when it happens? Is this normal?? I only have 1k miles on it. :)

FRANKD3TANK Enthusiast

FRANKD3TANK

Posted
Posted

Mine has this too, only thing that on mine it feels like its misfiring, but I have never gotten a check engine light yet. Its been like this for about 10,000 miles now.

Crazy Canuck Enthusiast

Crazy Canuck

Posted
Posted
Mine has this too, only thing that on mine it feels like its misfiring, but I have never gotten a check engine light yet. Its been like this for about 10,000 miles now.

 

 

+1. I think it is telling me I need to buy a 6.2 in the spring when my lease is up.

MaverickZ71 Senior Enthusiast

MaverickZ71

Posted
Posted
Hey guys,

 

I noticed today when I stop at stop lights sometimes the truck has a grumble and the rpm's change slightly. It almost feels like a the truck shakes when it happens? Is this normal?? I only have 1k miles on it. :angel:

 

From reading on this forum, a better question would be "does anybody else NOT have this?!"

txab Senior Enthusiast

txab

Posted
Posted

I have heard this being attributed to the tuning of these engines for MPG and emission.

Denali_Joe Enthusiast

Denali_Joe

Posted
Posted

6.2 does it too :thumbs: rest assured it's just the 800 rmp idle speed. When I got my tune done by blackbear, Justin turned up the idle a couple hundred rpms, and smooth as butter. Had him put the idle back down to the stock speed though. Now that I've had the truck for over 8 months I don't even notice it anymore. you want a silky smooth idle, buy a tundra with the 5.7, that's what I had before the sierra and that's why I thought something was wrong with my engine. If you want a real truck, stick with the GM, some of us are just slow learners, but we come back around, Only had the tundra for a little over 2 years. Ride is gawd awful drivetrain power and setup is fantastic, changing the oil sucks, in the tundra that is and just about everything else with it is below average.

 

Mine has this too, only thing that on mine it feels like its misfiring, but I have never gotten a check engine light yet. Its been like this for about 10,000 miles now.

 

 

+1. I think it is telling me I need to buy a 6.2 in the spring when my lease is up.

 

Stevens03 Senior Enthusiast

Stevens03

Posted
Posted

Can't say I notice it on mine, but I'd bet if you get gas from various places, you could get bad gas.

mike699 Enthusiast

mike699

Posted
Posted
Mine has this too, only thing that on mine it feels like its misfiring, but I have never gotten a check engine light yet. Its been like this for about 10,000 miles now.

 

 

+1. I think it is telling me I need to buy a 6.2 in the spring when my lease is up.

 

 

Totally worth it to buy the 6.2L but mine does the exact same thing when idling. I think its just the nature of the beast!

Stex Senior Enthusiast

Stex

Posted
Posted
I have heard this being attributed to the tuning of these engines for MPG and emission.

 

Yep, when my 09 was new I went to several dealers and two independent shops and they told me it is emissions driven as they have leaned out the truck at idle to cut emissions and thus also help mpg...

 

I now have 20,000 miles and it has smoothed some. It helped to go to syn oil and I ran BG 44k at 5m and then now at 20m miles.

fbachman Senior Enthusiast

fbachman

Posted
Posted

Mine does it on the factory calibration. With the custom tune, it does not. Not sure what exactly makes it go away via the custom tune......

 

Reason I noticed is that I recently reverted back to stock for a month for various reasons, and just got her tune back in her again.

BadBowtie1 Enthusiast

BadBowtie1

Posted
Posted

Ya I thought it might have been doing it when the fans come on because it doesn't do it all the time. The a/c puts a load on the truck when there on maybe the fans change the rpm's when they come on to and that what we feel. :eek:

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