well the car is na-t, stock ecu,walbro pump. i had a mapecu2 but sold it. before when i first put the turbo kit on with the stock ecu it would run like stock at idle and in vaccuum. now its running lean. even i bypass the charge pipe to the throttle body and put the filter with the MAF as it were to be back to NA it still runs lean. im just at a loss and cant figure it out. i know the car threw a code for the egr like 2 yrs ago but never changed it and it never ran lean. idk if its the egr or what or if vaccuum lines not in the right places can cause this.