I am using a 05 4.8L and just finished a turbo build on it I had it running and driving very good on the stock injectors but need more to keep from maxing duty cycle. I bought a set of seimens 60lb and installed them tonight. I watched the Gregg banish tuning dvd again while I was changing injector data and I am lost car started right up. But something is way off the warmer it gets right at the end of this log when I shut it down you can see it surging real bad. I did a log right before I removed the injectors so I can compare lambda so everything else in the tune should be close. But Lambda is way different. The first log is when I let it warm up before I swaped injectors, second is with injectors in. Then also a copy of my tune please help me try to figure out what I have got way wrong here. I also am using a 04 intake so it has return and vacuum frp on the rail.
Thanks In Advance