turbo has been running smooth for a couple of months now but i notice sometimes while spooling up at around 30 mph i hear it spool but i dont feel as much power it just climbs as if i didnt have a turbo and sometimes when the gears change the car jerks....i am auto by the way anyone know what would cause that?

 

Maybe a boost leak...since you can hear the turbo spool easier. And the jerking in between gears is the fact you have a turbo on our crappy auto tranny; I even get a little of that running N/A.