Power flickers

Thanks for the answers!

iv’e done the mod like in the pictures. Apart from bat + on alternator goes directly to positive on battery with 1 gauge cable. And cable through firewall is a 9 gauge. Connected to the cable from the splice going to amp meter directly. So bypassed the amp meter.

I’m going to the garage in the weekend and will continue checking for bad connections.. need to get a new LSU wideband to as it seems being toast. Showing full lean since the power problems…