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I have gmc sierra 2014 5.3, i have problem with o2 sensors i…

I have gmc sierra 2014...
I have gmc sierra 2014 5.3 , i have problem with o2 sensors i have changed them all but still the car getting lean while in idel but when i drive its fine and the AFR GOSE TO 18 !!!
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Customer reply replied 1 year ago
I checked the grounding in the car and everything is fine
Answered in 29 minutes by:
2/19/2017
Chris (aka-Moose)
Chris (aka-Moose), GMC Technician
Category: GMC
Satisfied Customers: 52,579
Experience: 16 years of experience
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Welcome, I'm Chris (aka Moose). Thanks for allowing me to help you for a much lower fee than a dealership.

.

Are you getting stored trouble codes?

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Customer reply replied 1 year ago
Thank you Chris for your reply , yes I'm getting DTC CODES for all the o2 sensors

Each O2 can store about 6 codes. Can I get the codes you have?

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Customer reply replied 1 year ago
Acutely i cant tell u now cause I'm out side , but its p0137 and all them which is sensor bank 1 and 2 lift and right , and i have replaced them all the 4 sensors but still car goes lean and chick engine light appeared

When you can tell me all the codes that will help. For now, lean codes are a result of an O2 sensor reading, but doe not mean the sensor is to blame, it is just telling you what it sees. Running lean is a sign of a dirty or bad MAF sensor, vacuum leaks allowing unmetered air to get into the intake from a source other than the air filter, or low fuel pressure. Have you checked any of these things?

.

When you are ready, please make sure to rate the question and or say you are pleased with my help so the website will compensate me from your deposit. Rating does not close the question, prevent you or I from replying. It will also keep a post open forever rather than timing out in 7 days.

Thanks Chris

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Customer reply replied 1 year ago
For the MAF sensor no acutely , but ill be checking thus thing again tomorrow , for the fuel i checked its fine and great , to be clear my car is supercharged by whipple and full exhaust and been tuned by HP , no any issues with car since i placed the WHIPPLE but suddenly this thing happened to me , tomorrow will check the MAF and will let u know what will happen .

Now that I know the truck is altered, the same answer still applies but I will not be able to go into detail on the input the SC and programmings possible relation to the issues since I do not work on many altered vehicles.

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Would you like me to upload the diagnostic steps for these codes?

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Customer reply replied 1 year ago
Plz why not , at least to solve the problem
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Customer reply replied 1 year ago
Ill check thus steps tomorrow , after that ill come back to u ,

Super

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Customer reply replied 1 year ago
55357;�

Thanks

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Customer reply replied 1 year ago
Thank u. But today they put the sensors in resistance learn mode but when i took the car for drive around 20 km it becomes lean again ��

Did you do all the checks I outlined to see if one of those is to blame causing the engine to run lean?

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Customer reply replied 1 year ago
the outlined you been told all are fine MAF VACUM LEAKS ETC

If there are no vacuum leaks, the MAF is reading accurate, and fuel pressure is right. Then it would be a computer issue or a programming concerns with your add on parts.

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Customer reply replied 1 year ago
The thing is while driving totally fine and great Only in idle mode after 2 - 3 min it goes lean

Your computer controls the fuel injector on time to prevent running lean and at idle that is when you have the highest vacuum which would cause a leak to evident.

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Checking in to see how things are going.

I noticed you have viewed my answer, but you have not rated it, replied, nor gotten a refund. Are you having trouble figuring out the website or having trouble replying? Just so you know this post is still open for now and I am still available to help more when you are ready. If no more assistance is needed, please take a moment to rate my answer or leave me some comments about your experience.

Thanks Chris

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Customer reply replied 1 year ago
Why they charge me again !!!
Customer reply replied 1 year ago
May i know why !!

I can not see details of your account. You can contact the website and ask them. All I can see is what you and I wrote and I can see you were not pleased with my help and did not rate my answer.

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Customer reply replied 1 year ago
Ill contact them , may i know please when i have to change the spark plugs ?

I can answer follow up questions not related to the original question once the post has been rated.

Chris (aka-Moose)
Chris (aka-Moose), GMC Technician
Category: GMC
Satisfied Customers: 52,579
Experience: 16 years of experience
Verified
Chris (aka-Moose) and 87 other GMC Specialists are ready to help you
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Customer reply replied 1 year ago
Does the spark plugs effect and cause the lean in idling?

Spark plugs will not cause a lean running issue. They would cause a misfire. BEst case scenario plugs should be changed every 70k

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Customer reply replied 1 year ago
Mine now 100K , what spark plugs do u recommend to get ?

ACDELCO for your truck

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