2014 rough idle in Drive (109K miles)

[JBravo1977]

My 2014, 5.3L Tahoe has recently developed this problem where every several seconds I feel a rough idle just for a second or so. At first, I thought another car had bumped into me at a red light, then realized it was happening whenever I was stopped in Drive. Any thoughts?

 

[OR VietVet]

Welcome to the forum.

Any CEL? How old are tune related parts? Checked for vacuum leaks? Age of MAF and MAP? Throttle bore ever been cleaned? Miles on the rig?

 

[wsteele]

I did have a low idle miss once that didn't produced a code. It is a long story what ended up being the problem and almost certainly isn't the issue with your model year.

Did you do a tune up at 100K miles?

You can buy a very inexpensive ODB scanner that will tell you if you do have any DTC's stored. Some as cheaply as $20 that work with a smart phone.

 

[BG1988]

My 2014, 5.3L Tahoe has recently developed this problem where every several seconds I feel a rough idle just for a second or so. At first, I thought another car had bumped into me at a red light, then realized it was happening whenever I was stopped in Drive. Any thoughts?

i would check the spark plug cables I found two of mine loose this explains a lot of things [Surprised pikachu face] i pushed them and heard a *pop*..

 

[TollKeeper]

Could also just be a collapsed motor mount.. pretty common on this platform

 

[91RS]

Engine mounts.

 

[wsteele]

The motor mount idea is a good one. Very easy to check.

 

[JBravo1977]

I appreciate your input about the mounts, guys. Can somebody explain that to me like I know nothing about it?

 

[TollKeeper]

This may be helpful..

Motor Mounts - 2008 Chevy Tahoe Z71 4x4

For about a year my Tahoe has had a clunk when accelerating quickly from a stop and I always thought it was something to do in the rear end. Today I tried hitting the accelerator while my foot was on the brake and I was able to replicate the problem. I popped the hood and did it again and I can...

www.tahoeyukonforum.com

 

[OR VietVet]

I appreciate your input about the mounts, guys. Can somebody explain that to me like I know nothing about it?

The mounts hold the engine in place and are rubber or even fluid filled. I would have to look that up. The rubber can break and/or wear out and sag and allow the vibes from the engine to transfer to you and you feel it. They catch the torque of the engine when changing gears and accelerating. Easy to check.