Before the last rebuild ( just head gaskets )I was getting 8 on the left and 15 on the right.
Afterwoods I got 25 (max I think) on both.
This was with the 4L MAF, and the Tornado ECM which is written for a 4.6 MAF.
So I ALSO thought the new ECM is getting unexpected/wrong data from the 4L maf(which it is/was.)

So after installation of the 4.6 Thor RR airbox lid and RR 4.6 MAF I thought a LTFB of Zero might be nice--
but no. still 25.


are the 4.6 thor oxy sensors different?