Fuel trim live data

[Tim10]

Hi, everyone

Doing some live data on fuel trims my 2016 Tahoe
and I see that long fuel trim bank 1 is negative -10.2
when idle, once I increase RPM to 2500 it gets better around -3%
From reading on a forums and google it tells me that it runs rich. Should I be checking deeper and what’s your suggestion guys?

 

[Camarochief]

your maf sensor could be dirty

 

[BG1988]

Hi, everyone

Doing some live data on fuel trims my 2016 Tahoe
and I see that long fuel trim bank 1 is negative -10.2
when idle, once I increase RPM to 2500 it gets better around -3%
From reading on a forums and google it tells me that it runs rich. Should I be checking deeper and what’s your suggestion guys?

negative is less fuel command
positive is more fuel command
generally it should be about zero

short term idle should be 0 (±0.8)
long term idle 3 to 5


vacuum leak or faulty MAF.. or leaky fuel injector(s)


i would clean the MAF ONLY USE MAF cleaner let it dry before putting it back on

recommend disconnecting the battery before servicing

 

[HiHoeSilver]

Hi, everyone

Doing some live data on fuel trims my 2016 Tahoe
and I see that long fuel trim bank 1 is negative -10.2
when idle, once I increase RPM to 2500 it gets better around -3%
From reading on a forums and google it tells me that it runs rich. Should I be checking deeper and what’s your suggestion guys?

How's your air filter?

 

[Tim10]

How's your air filter?

Brand new , I always change them on time


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