Hi All, I'm a long time lurker and infrequent writer.
I am currently tuning a '04 Silverado SS with a 408, big cam (spec sheet included), 3bar SD, 60lb Deatschwerks injectors at 48psi, and a single turbo. I am having trouble getting the fueling correct at idle. If I drop the VE table to something <= 25, the LTFT and STFT will max out and get me around 14.1 on my wideband. I expect I have issues with my injector data, but I got the data directly from DW. In this tune I did halve the injector voltage offsets to see if it would drop the pulsewidth below 2.3ms, but it did not make a difference.
This is a return style fuel system, so I copied the 0kPa column across for voltage offset and set a constant flow rate. I have attached the latest tune and data log. The truck starts and idles well but achieving proper lambda and transient behavior has been difficult. I changed the transient fuel to .002 per information I saw here, but there seems to be something else that I am missing. Any thoughts would be greatly appreciated. Thanks!