Proper Long Term Fuel Trim values

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Old Aug 28, 2012 | 10:44 AM
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Proper Long Term Fuel Trim values

Howdy folks!

I have a question about LTFT values. During throttle on, my Torque Pro app is reporting roughly 4.7% on Bank 1 and 6.2% on Bank 2. While I'm at idle, those numbers jump up to ~10% and ~11% respectively. Does that seem right?

All 4 O2 sensors were replaced ~3yrs ago. LSS, went in to replace 2 sensors, shop replaced the wrong 2, so I got 4 for the price of 2.
 

Last edited by SubSkip; Aug 28, 2012 at 10:58 AM. Reason: added O2 replacement
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Old Aug 28, 2012 | 10:55 AM
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See yellow and orange lines:

 
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Old Aug 28, 2012 | 03:42 PM
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Its a little lean. Try cleaning the MAF and reseting the Keep Alive Memory (KAM) by either disconnecting the battery for a while or doing it with a handheld. Intake gaskets could be letting a little air in too or PCV hose.

It wont throw a check engine light until 15% usually so Ive seen
 
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Old Aug 28, 2012 | 04:22 PM
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Thanks! Is the 5% jump during idle normal or a possible consequence of what you listed above?
 
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