Idle issues

[nicks2014sierra]

I have a 2014 GMC Sierra I've noticed for a while now that it idles a little rough..But today the check engine light came on and I noticed the idle issue got worse to the point where it almost bogs out and once or twice when I start it up it bogs out immediately. Anyone else experience this? If so what were the issues and fix?

 

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[Sierra706]

I have a 2014 GMC Sierra I've noticed for a while now that it idles a little rough..But today the check engine light came on and I noticed the idle issue got worse to the point where it almost bogs out and once or twice when I start it up it bogs out immediately. Anyone else experience this? If so what were the issues and fix?

 

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How many miles? Could be oil caked intake valves.

 

 

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[silveradosid]

get the codes read and post them, that will get you more information

[calgator73]

Causes are generally pretty straight forward. Caked intake valves (not using top tier gas or wrong oil), bad injector, bad coil, bad plug, bad lifter. Codes are essential.

 

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[AllTerrainX]

get the codes read and post them, that will get you more information

^^^what he said. Get the check engine codes

[Abearclaw]

Funny I actually did experience this exact thing when I used a dealer loaner truck. 2016 Sierra, and it idled super rough and only had like 16k on it

 

 

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[nicks2014sierra]

I have 50 k miles on it and my father in law owns a shop. He plugged it in yesterday and said it was running lean and had codes for 02 sensor

 

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[Ravenkeeper]

My '15 Silverado has been doing the same thing. Asked mechanic to look at it a couple oil changes ago, They aren't sure why these trucks are going this, but they assured me that they are all tuned/timed properly.

[djxn40]

My 2016 silverado 49000 miles has started rough idle... P050D and P0307. After the cold start about 30 seconds and it runs and drives great

 

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[djxn40]

My 2016 silverado 49000 miles has started rough idle... P050D and P0307. After the cold start about 30 seconds and it runs and drives great

 

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I solved this by cleaning my throttle body and valves. All smooth now

 

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[calgator73]

I solved this by cleaning my throttle body and valves. All smooth now

 

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Do you always use top tier fuel and synthetic oil?

 

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