Originally Posted by
04silverado6.0
Ive already adjusted injection timing. After the ve and maf are fully dialed in you will adjust in small increments to find the most negative(rich) fuel trim. It is probably set close enough to leave it alone. I did not use a spreadsheet or anything, just made a good guess. Your fuel trims actually do not look horrible, i do not re-enable ltft on tunes. I go by the wideband and get the error i want and leave ltft off. Also, there is no law stating high rpm disable needs to be 4000 rpm. I usually set it around 2600-3200 or slightly above stall speed. Depending on your converter you may be into steady state well before 4000.