I have a 1982 Chevy S-10 that I put an LQ4 in. I'm using a P01 and a 0411. the original tune on the pcm is 12208322 and I'm trying to load a 12216125 OS. I don't know if that is a factor. When I load one tune from my tuner the truck runs fine, when i load the flex fuel OS the scanner shows negative timing advance and it runs bad with low engine rpms. What am I doing wrong, or forgetting to do? 1982 chevy s-10 swap lq4 silverado tune adjusted 4.hpt009.hpt9 22 am on 3 may 2023.hpl