issue 2014 rough engine idle

[janecka1]

Janecka,

 

That was a good video vibration is similar to mine, I do not see any variation in the tachometer but do feel it like a cylinder or two is missing during idle and it happens once the engine warms up and the coolant temp shows 210 degrees.

 

I have not taken it in yet since I have been under the weather for a few days but I am going to be contacting my dealer and also take a similar video to yours so I can show them the vibration is there and not in my head.

 

Let me know what you find out.

Thanks.

Ryan

 

I will keep you informed. I am bringing it this wed for the vibration, check engine light, and recall. Also send me a link to your video you are gonna make. I would love to see the vibrations you are having

[reldridg]

I will keep you informed. I am bringing it this wed for the vibration, check engine light, and recall. Also send me a link to your video you are gonna make. I would love to see the vibrations you are having

Will do, I only got a little bit of the vibration today but it usually only happens after it has warmed up and I get a decent run on the highway in then come up to a light. I hooked up my OBD bluetooth reader today though while I was driving and before the engine was warmed to 210F it idled at about 600 rpm, once to 210F idle dropped to 510+/- RPM when I did feel the vibration idle was dipping to 480+/- RPM then going back up to 510 rpm.

 

Below 500 rpm seems pretty low to me, and surging between 480 and 510 rpm will probably make a vibration that can be felt.

[janecka1]

I hope they stop blowing you off and fix your truck. Clearly your engine is having issues. You will not feel a properly tuned 5.3L miss at all. Should be perfectly smooth or your engine has issues that need to be fixed.

Yeah, me too. Seems they just don't wanna put the time or effort into fixing it (at least the first time) maybe this time will be different since the check engine light is on.

[janecka1]

Janecka,

 

That was a good video vibration is similar to mine, I do not see any variation in the tachometer but do feel it like a cylinder or two is missing during idle and it happens once the engine warms up and the coolant temp shows 210 degrees.

 

I have not taken it in yet since I have been under the weather for a few days but I am going to be contacting my dealer and also take a similar video to yours so I can show them the vibration is there and not in my head.

 

Let me know what you find out.

Thanks.

Ryan

I took a video of the vibration (or lack of vibration) in my buddy's 2014 truck. It is

. The video of the vibration in my truck is

. Hopefully you can see the difference. I was supposed to bring my truck in today, but they postponed it because they couldn't find me a loaner car for today.

[ArtU]

I bet if they reporgramed the warm idle to 550 or something a little higher, the surging would go away. But I dont think they are allowed or able to make changes to the factory tune.

[ArtU]

Updates are done to factory tunes on a regular basis. As long as they are written by GM and EPA approved, they are fine. Upping the idle to fix another problem would raise emissions and be a big no no. The properly tuned 5.3L idles smooth as a babies butt with no stumble or miss so why would GM want to raise the idle RPMs because a defective engine idles rough?

 

It is my experience that some 5.3 motors just can not idle smooth this low. Buildup on throttle bodies, idle meter vents, TPS sensors and other things plague the 2008 5.3 others and myself own. The idle was taken down to the spec floor for GM to meet better emissions, not driver satisfaction. This is the same compliance issue with AFM. It makes better numbers for GM emissions, but has been proven to cause engine damage and removing it does not lower MPGs even. AFM just causes ring/piston problems and oil consumption. First they said it affected only 2007-2009s, and the new ones are fine. Now the AFM problem only is said to affect 2007-2011s, how much you want to bet in a few years AFM effects 2012-2013s as well?

 

Why do I bring AFM up while talking about idle? Because a good running older 5.3 will run smother and more constant at 520-550, which was only made so low at the factory to get better emissions numbers and not about pleasing customers in the long run. The AFM issue is a direct parallel in looking for numbers, not long lasting trucks/customers.

 

I sure hope the OP gets his water shakin' issue solved, I would not be happy with a 2014 having the continued radom truck idle problems that started in late 2007. (random meaning lots have the problem, but not all)

 

GM lost me as a future customer and I bought Ford for my new car.

[ArtU]

What you listed is part of keeping a 5.3L engine tuned and idling perfectly smooth. I can't count the number of rough idlers that have been fixed by cleaning the carbon out of the intake. I do both of mine every 25k miles to keep them baby smooth. Grab an old tooth brush & some TB cleaner & get after it!

 

I agree, but how come under warranty when you bring it in, GM says its normal. They should be cleaning it not me. And if I do it, they can say ext warranty void for shade tree work on the fuel intake systems. On the TPS, you cant really clean it, you need to replace it but they wont unless you get a CEL lite code. You don't pay extra for extended warranties to be pullin' your own TB and intakes.

[reldridg]

Janecka have you heard anything yet about your idle?

 

Yesterday was my first decent length trip for a couple of weeks and when I came back into town at the first light it started to idle rough again I have been trying to recreate up till now but it does look like I need to drive it for awhile before it happens.

 

When I hooked up my monitor to it while it was idling rough RPMs stayed pretty constant right at 500-510 only once dipping down to 490rpm.

 

Just checking in,

thanks.

[fondupot]

Also curious what you heard about this.

[janecka1]

Janecka have you heard anything yet about your idle?

 

Yesterday was my first decent length trip for a couple of weeks and when I came back into town at the first light it started to idle rough again I have been trying to recreate up till now but it does look like I need to drive it for awhile before it happens.

 

When I hooked up my monitor to it while it was idling rough RPMs stayed pretty constant right at 500-510 only once dipping down to 490rpm.

 

Just checking in,

thanks.

 

I brought my truck in on Thursday. I didn't hear from them at all until I called on Monday. The say the engine light came on because of an emissions error. They said they tighten the gas cap and reset the light and it hasn't come back on. (I always tighten my cap by the way). They said they had no idea about the vibration. No error codes were coming up. They said the contacted Chevrolet and were waiting to hear back. They called be back 2 minutes later and they said Chevrolet told them to shim the engine mount 3mm, but they couldnt get to it today. The dealership faxed me what chevy sent them. I guess we will see tomorrow, or Wednesday, or Thursday..... They aren't the greatest on keeping the costumer informed.

Jason

Also curious what you heard about this.

 

 

I brought my truck in on Thursday. I didn't hear from them at all until I called on Monday. The say the engine light came on because of an emissions error. They said they tighten the gas cap and reset the light and it hasn't come back on. (I always tighten my cap by the way). They said they had no idea about the vibration. No error codes were coming up. They said the contacted Chevrolet and were waiting to hear back. They called be back 2 minutes later and they said Chevrolet told them to shim the engine mount 3mm, but they couldnt get to it today. The dealership faxed me what chevy sent them. I guess we will see tomorrow, or Wednesday, or Thursday..... They aren't the greatest on keeping the costumer informed.

Jason

[janecka1]

Random question... What if they can't fix the vibrations? What are my options. What if the say "we'll, not all trucks run as smooth as others". What are my options if they say they can't fix something that is not coming up with an error code?

[fondupot]

While you would think the Quality control is tight enough on these trucks to build an exact copy every time off the assembly like it's not possible. So your trucks harmonic balance might be different than day your buddies truck whose does not vibrate.

 

You could have a custom tune installed that raises the idle rpms so that the engine gets "out" of the current wave that causes the vibrations. Hopefully then removing the vibrations.

 

Just a thought.

 

 

Sent from my iPhone.

[janecka1]

Good news! I got my truck back today and the vibration is unnoticeable. They said they shimmed the engine mount 3mm and it seemed to fix it.

[reldridg]

Nice that sounds like they got you taken care of that is great.

 

I am going to try and get mine into the dealer next week hopefully if I have time.

[fondupot]

Good to hear. I might have to have a trip to my dealer.

 

 

Sent from my iPhone.