Hello, im in the middle of doing the OLSD tune on my 98 Sonoma. Its an AFR headed 383 sbc 11:1 CR, it has a single plane with a 4150 TB, T56 Magnum etc. Its a 24x SBC running an 0411 with a 2002 F body OS and LS coils. The injectors are Siemens Deka 80's. Im only running a large injector because I plan on adding a Procharger down the road and wanted to buy just one set, I was told you could tune around them. I have my wideband setup right after the header where one of the NBs go.
After going out to do a log I keep finding that no matter what I do my error graph keeps reading pig rich below 55kpa and then goes hard lean right after 55kpa in most spots. Ive tried adding and subtracting fuel to try and smooth it out but the problem never really goes away and I end up with a diagonal line through my graph. I figured the issue must be in the settings somewhere, I used injector data that I was told was right for these, I have run them first at 58 psi then at 43 with no real difference. I was thinking it was an issue with PE being right around 55 kpa. Sorry im not an expert tuner or anything this is only my third car. Any input is appreciated.
98 Sonoma 383.hpt
24-05-13 13-23-14.hpl