motosledneck12

I recently put in a set of diamonds pistons, (stock CR) and a rebuilt head with some mild exhaust porting.
After about 80 miles I have a miss at a moderate load. I checked the plugs and it is running scary lean. Plugs are white. I have an appointment to get the car tuned on Friday and I need to drive the car there and have the motor broke in by then. A friend of mine has hp tuners and neither of us know how to use it correctly. I have been researching for over a week and it is still foreign to me. Can anyone please tell me how to richening it up to a safe zone so I can just cruze with it. I won't be doing hard pulls.
My setup is full bolt ons. Tvs 2.7, 80#, water/meth 14 nozzle

09CobaltSS1

First and most important question, what exactly is your afr, what area of the maf are you seeing it and are you entering PE when you are seeing these lean conditions? Secondly, do you even have a wideband and are you basing these lean conditions purely off of reading the plug?