2006 explorer 4.0l sohc v6 ,how long does it take for the long term fuel trims to kick in after a reset

What is your question?

2006 explorer 4.0l timing was off one bank of cly kept getting misfire codes ,removed engine and had timing chains done all 4 chains ,now how long before{ ltft} long term fuel trims , start working cause now they are at zero all the time after the repair, no eng codes ,engine runs like new smooth

How long has your 2006 Ford Explorer had this problem?

awhile