LTFT differences left to right

[Slowrc]

How much should LTFT vary from bank to bank before you need to start looking for air leaks in the intake or exhaust? I am looking at one that is 7 and 14. has not been tuned yet.

THANKS...

[WeathermanShawn]

Sometimes an air leak (exhaust).

Also drivers side bank has that occasional EVAP purge..which can mess the driver-side Trim. EVAP can even mess up WOT.

Lot of little things..but 7 to 14 Trim swing is pretty large..