airflow sensor

[xinghonh]

okok so i had chg my airflow sensor to gsr 449 as my stock one is giving me problem
chged cz my old afs cz the check engine light doesnt go away
but probi release and press the throttle again..the car jerks...nw the check engi is after i chged...during idle the car jerks...when im crusing at 5th gear...when ne light lights up once in a while...
y is this so?ecu has been rechip frm na mapping to turbo mapping...my engine is 4g93p bot

 

[hidlight]

change the ecu...