not really.
scan your mafs kpa, and ltft. along with what ever else you like to scan for.
make yourself a paper work sheet # it 10 20 30 all the way to 100. then write down the ltft for each cell in the maf kpa
say at 30 kpa, you see -8 ltft you would subtract 8 from the injector flow rate file. its set up 10 - 100 just like the maf kpa.
the guide ive read how to do this says to take the ltft number and add or sub tract as needed, but ive found if you take the full # you'll over shoot. so if it was 8 id take 5 out. and so on for each cell.
if you want i have a manual that explains this much better im sure lol i can email it to you if you like.
like five finger said, with dhp - #'s are rich, + #'s are lean.
so if you have pos trims, your adding fuel, neg you subtract.
