1st Gen 4.7 long term Fuel trim normal percentage

Ok guys I’ve looked all over and have not been able to find the OEM specifications on the long term fuel trim for both banks, engine completely cooled and not running I read 0.8% on bank one and 1.6% on bank 2. Any help would be much appreciated

 

I have a record of data I recorded on all my OBD2 parameters years back when everything was sort of newish including those. If I get time today, I'll post a graph and average of the data here.

I think it's on the IDE hard drive of my Pentium 1 computer I haven't used since 2005.

 

FSM calls for 0 +-20 %

Those are simply the LTFT learned numbers at the moment you last shut off your truck. They will vary after each and every drive cycle at the moment truck is turned off.

Are you experiencing problems or simply trying to understand fuel trims ?

This may not help but these are pics from this AM. First pic is what was in the ECM table when I turned IGN ON with EG OFF from sitting over night. The 2nd pic is after I returned from town, turned EG OFF, placed key back to IGN ON only.