Good evening everyone after about 8 years I once again have a tuner! I have a 2011 CTS-V I installed 2.55 pulley, isolator, 160 thermostat and Cold air intake. I did a test run just now and I get a surge in 3rd gear or higher after 3500 RPM. Could it just be a lean condition? Maf reading bounces around which lead me to check every ring clamp on the intake kit but nothing is loose. I haven't connected a wideband yet still in the mail somewhere. I copied a tune I found on here for torque management, timing and PE to try and get a base tune and it helped ever so slightly with the surge. Any help is appreciated!CTSV modified tune changed low and high octane tables and PE.hpttest run.hpl