I got my LTFT's set pretty good in SD. When I reinstated MAF, the numbers were way high again, running lean. I found an air leak in my cobbled up intake tube so I made up an aluminum tube and no more air leaks. However, trims are still high.
Would I be looking at the MAF sensor or do I need to make adjustments to the tune?
2004 5.3 with flat tops, 6.0 liter cam, 243 heads.