on my camaro, I just got a pcmforless tune, and now when I put it in neutral, and try to hold steady revs at any rpm, rpms drop around 100 or so, then raise back up. Also when im driving, during acceleration, I can slightly feel the car pulling, then not, then pulling, kind of going in and out. Very subtle. Doesnt happen at wot though. It also only happens after car has warmed up. Prior to the tune, it didnt do this. Is this normal?

 

If it didn't due it prior to the tune change, talk with your tuner.